./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.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 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:45:44,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:45:44,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:45:44,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:45:44,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:45:44,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:45:44,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:45:44,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:45:44,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:45:44,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:45:44,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:45:44,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:45:44,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:45:44,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:45:44,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:45:44,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:45:44,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:45:44,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:45:44,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:45:44,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:45:44,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:45:44,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:45:44,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:45:44,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:45:44,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:45:44,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:45:44,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:45:44,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:45:44,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:45:44,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:45:44,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:45:44,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:45:44,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:45:44,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:45:44,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:45:44,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:45:44,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:45:44,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:45:44,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:45:44,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:45:44,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:45:44,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:45:44,408 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:45:44,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:45:44,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:45:44,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:45:44,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:45:44,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:45:44,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:45:44,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:45:44,411 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:45:44,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:45:44,411 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:45:44,412 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:45:44,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:45:44,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:45:44,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:45:44,412 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:45:44,412 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:45:44,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:45:44,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:45:44,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:45:44,413 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:45:44,413 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:45:44,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:45:44,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:45:44,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:45:44,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:45:44,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:45:44,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:45:44,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:45:44,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:45:44,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:45:44,415 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:45:44,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:45:44,415 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:45:44,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:45:44,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:45:44,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:45:44,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:45:44,697 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:45:44,697 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:45:44,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-30 00:45:45,653 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:45:45,818 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:45:45,818 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-30 00:45:45,823 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d5b756c6/8eb21a7a85d64283990c11a6f231e940/FLAG779d288d7 [2023-08-30 00:45:45,836 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d5b756c6/8eb21a7a85d64283990c11a6f231e940 [2023-08-30 00:45:45,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:45:45,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:45:45,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:45:45,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:45:45,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:45:45,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:45:45" (1/1) ... [2023-08-30 00:45:45,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218f2857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:45, skipping insertion in model container [2023-08-30 00:45:45,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:45:45" (1/1) ... [2023-08-30 00:45:45,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:45:45,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:45:46,034 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-mult-4.wvr.c[2612,2625] [2023-08-30 00:45:46,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:45:46,049 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:45:46,081 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-mult-4.wvr.c[2612,2625] [2023-08-30 00:45:46,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:45:46,090 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:45:46,091 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:45:46,096 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:45:46,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46 WrapperNode [2023-08-30 00:45:46,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:45:46,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:45:46,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:45:46,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:45:46,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,140 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-08-30 00:45:46,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:45:46,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:45:46,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:45:46,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:45:46,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,177 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:45:46,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:45:46,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:45:46,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:45:46,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (1/1) ... [2023-08-30 00:45:46,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:45:46,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:45:46,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:45:46,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:45:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:45:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:45:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:45:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:45:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:45:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:45:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:45:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:45:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:45:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 00:45:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:45:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 00:45:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:45:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:45:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:45:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:45:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 00:45:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:45:46,288 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:45:46,385 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:45:46,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:45:46,628 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:45:46,654 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:45:46,654 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:45:46,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:45:46 BoogieIcfgContainer [2023-08-30 00:45:46,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:45:46,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:45:46,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:45:46,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:45:46,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:45:45" (1/3) ... [2023-08-30 00:45:46,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8d14f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:45:46, skipping insertion in model container [2023-08-30 00:45:46,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:45:46" (2/3) ... [2023-08-30 00:45:46,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8d14f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:45:46, skipping insertion in model container [2023-08-30 00:45:46,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:45:46" (3/3) ... [2023-08-30 00:45:46,662 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-08-30 00:45:46,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:45:46,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 00:45:46,677 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:45:46,763 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 00:45:46,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 148 transitions, 328 flow [2023-08-30 00:45:46,827 INFO L130 PetriNetUnfolder]: 10/144 cut-off events. [2023-08-30 00:45:46,828 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:45:46,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 144 events. 10/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 154 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-30 00:45:46,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 148 transitions, 328 flow [2023-08-30 00:45:46,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 140 transitions, 304 flow [2023-08-30 00:45:46,838 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:45:46,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 140 transitions, 304 flow [2023-08-30 00:45:46,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 140 transitions, 304 flow [2023-08-30 00:45:46,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 140 transitions, 304 flow [2023-08-30 00:45:46,866 INFO L130 PetriNetUnfolder]: 10/140 cut-off events. [2023-08-30 00:45:46,867 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:45:46,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 140 events. 10/140 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 153 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-30 00:45:46,869 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-30 00:45:50,757 INFO L134 LiptonReduction]: Checked pairs total: 3407 [2023-08-30 00:45:50,758 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-30 00:45:50,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:45:50,771 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;@75940df8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:45:50,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 00:45:50,772 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 00:45:50,772 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:45:50,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:50,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 00:45:50,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:50,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash 577, now seen corresponding path program 1 times [2023-08-30 00:45:50,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:50,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854212732] [2023-08-30 00:45:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:50,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:50,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:50,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854212732] [2023-08-30 00:45:50,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854212732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:50,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:50,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 00:45:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852131069] [2023-08-30 00:45:50,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:50,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 00:45:50,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 00:45:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 00:45:50,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 278 [2023-08-30 00:45:50,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:50,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:50,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 278 [2023-08-30 00:45:50,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:51,146 INFO L130 PetriNetUnfolder]: 2518/3157 cut-off events. [2023-08-30 00:45:51,147 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 00:45:51,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6409 conditions, 3157 events. 2518/3157 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11209 event pairs, 1179 based on Foata normal form. 0/1490 useless extension candidates. Maximal degree in co-relation 4953. Up to 3127 conditions per place. [2023-08-30 00:45:51,162 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-30 00:45:51,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-08-30 00:45:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 00:45:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 00:45:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 304 transitions. [2023-08-30 00:45:51,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467625899280576 [2023-08-30 00:45:51,172 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 304 transitions. [2023-08-30 00:45:51,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 304 transitions. [2023-08-30 00:45:51,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:51,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 304 transitions. [2023-08-30 00:45:51,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 152.0) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,181 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,182 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 116 flow. Second operand 2 states and 304 transitions. [2023-08-30 00:45:51,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-08-30 00:45:51,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 00:45:51,187 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-08-30 00:45:51,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-30 00:45:51,190 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 00:45:51,191 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-08-30 00:45:51,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:51,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:45:51,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 00:45:51,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:51,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash 566674, now seen corresponding path program 1 times [2023-08-30 00:45:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:51,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584679873] [2023-08-30 00:45:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:51,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:51,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584679873] [2023-08-30 00:45:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584679873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:51,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:51,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:45:51,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004124490] [2023-08-30 00:45:51,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:51,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:45:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:45:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:45:51,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 00:45:51,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:51,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 00:45:51,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:51,693 INFO L130 PetriNetUnfolder]: 2407/3016 cut-off events. [2023-08-30 00:45:51,693 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:45:51,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6044 conditions, 3016 events. 2407/3016 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10641 event pairs, 1124 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 6041. Up to 2985 conditions per place. [2023-08-30 00:45:51,705 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 00:45:51,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-08-30 00:45:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-08-30 00:45:51,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4784172661870504 [2023-08-30 00:45:51,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-08-30 00:45:51,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-08-30 00:45:51,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:51,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-08-30 00:45:51,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,712 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 399 transitions. [2023-08-30 00:45:51,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-08-30 00:45:51,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 00:45:51,713 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-08-30 00:45:51,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 00:45:51,713 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 00:45:51,713 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-08-30 00:45:51,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:51,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:45:51,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 00:45:51,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:51,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:51,714 INFO L85 PathProgramCache]: Analyzing trace with hash 566676, now seen corresponding path program 1 times [2023-08-30 00:45:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:51,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571166719] [2023-08-30 00:45:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:51,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:51,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:51,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571166719] [2023-08-30 00:45:51,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571166719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:51,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:51,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:45:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207263270] [2023-08-30 00:45:51,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:51,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:45:51,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:45:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:45:51,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-08-30 00:45:51,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:51,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:51,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-08-30 00:45:51,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:52,057 INFO L130 PetriNetUnfolder]: 2296/2875 cut-off events. [2023-08-30 00:45:52,058 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:45:52,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5764 conditions, 2875 events. 2296/2875 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10020 event pairs, 1069 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 5760. Up to 2844 conditions per place. [2023-08-30 00:45:52,070 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 00:45:52,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-08-30 00:45:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-30 00:45:52,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49760191846522783 [2023-08-30 00:45:52,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-30 00:45:52,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-30 00:45:52,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:52,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-30 00:45:52,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,076 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 415 transitions. [2023-08-30 00:45:52,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-08-30 00:45:52,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:52,077 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-08-30 00:45:52,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-30 00:45:52,078 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-08-30 00:45:52,078 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-08-30 00:45:52,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:52,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:45:52,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 00:45:52,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:52,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:52,079 INFO L85 PathProgramCache]: Analyzing trace with hash 544587944, now seen corresponding path program 1 times [2023-08-30 00:45:52,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:52,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133088526] [2023-08-30 00:45:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:52,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:52,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:52,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133088526] [2023-08-30 00:45:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133088526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:52,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:45:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147508191] [2023-08-30 00:45:52,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:45:52,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:52,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:45:52,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:45:52,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 00:45:52,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:52,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 00:45:52,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:52,327 INFO L130 PetriNetUnfolder]: 2251/2812 cut-off events. [2023-08-30 00:45:52,327 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:45:52,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5639 conditions, 2812 events. 2251/2812 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9750 event pairs, 1048 based on Foata normal form. 0/1354 useless extension candidates. Maximal degree in co-relation 5635. Up to 2781 conditions per place. [2023-08-30 00:45:52,361 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 00:45:52,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-08-30 00:45:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-30 00:45:52,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473621103117506 [2023-08-30 00:45:52,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-30 00:45:52,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-30 00:45:52,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:52,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-30 00:45:52,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,365 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 395 transitions. [2023-08-30 00:45:52,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-08-30 00:45:52,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:52,366 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-08-30 00:45:52,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-30 00:45:52,366 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-08-30 00:45:52,367 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-08-30 00:45:52,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:52,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:45:52,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 00:45:52,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:52,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash 544587945, now seen corresponding path program 1 times [2023-08-30 00:45:52,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:52,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139111092] [2023-08-30 00:45:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:52,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:52,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139111092] [2023-08-30 00:45:52,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139111092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:52,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:52,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:45:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695539669] [2023-08-30 00:45:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:52,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:45:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:45:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:45:52,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-08-30 00:45:52,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:52,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-08-30 00:45:52,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:52,597 INFO L130 PetriNetUnfolder]: 2206/2749 cut-off events. [2023-08-30 00:45:52,598 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:45:52,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5514 conditions, 2749 events. 2206/2749 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9468 event pairs, 1027 based on Foata normal form. 0/1330 useless extension candidates. Maximal degree in co-relation 5510. Up to 2718 conditions per place. [2023-08-30 00:45:52,608 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 00:45:52,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-08-30 00:45:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-30 00:45:52,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49280575539568344 [2023-08-30 00:45:52,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-30 00:45:52,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-30 00:45:52,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:52,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-30 00:45:52,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,612 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 411 transitions. [2023-08-30 00:45:52,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-08-30 00:45:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:52,613 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-08-30 00:45:52,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-30 00:45:52,614 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 00:45:52,614 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-08-30 00:45:52,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:52,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:52,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 00:45:52,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:52,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash -636983692, now seen corresponding path program 1 times [2023-08-30 00:45:52,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:52,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153347850] [2023-08-30 00:45:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:52,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:52,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153347850] [2023-08-30 00:45:52,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153347850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:52,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:52,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:45:52,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120640015] [2023-08-30 00:45:52,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:52,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:45:52,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:45:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:45:52,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-08-30 00:45:52,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:52,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-08-30 00:45:52,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:52,860 INFO L130 PetriNetUnfolder]: 2103/2616 cut-off events. [2023-08-30 00:45:52,861 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:45:52,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5249 conditions, 2616 events. 2103/2616 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8908 event pairs, 980 based on Foata normal form. 0/1283 useless extension candidates. Maximal degree in co-relation 5245. Up to 2585 conditions per place. [2023-08-30 00:45:52,872 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-30 00:45:52,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-08-30 00:45:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-30 00:45:52,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904076738609113 [2023-08-30 00:45:52,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-30 00:45:52,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-30 00:45:52,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:52,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-30 00:45:52,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,878 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 409 transitions. [2023-08-30 00:45:52,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-08-30 00:45:52,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:52,879 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-08-30 00:45:52,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-30 00:45:52,879 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -14 predicate places. [2023-08-30 00:45:52,879 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-08-30 00:45:52,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:52,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:52,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 00:45:52,880 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:52,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:52,880 INFO L85 PathProgramCache]: Analyzing trace with hash -636983693, now seen corresponding path program 1 times [2023-08-30 00:45:52,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:52,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738061189] [2023-08-30 00:45:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:52,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:52,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:52,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738061189] [2023-08-30 00:45:52,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738061189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:52,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:52,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:45:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070259056] [2023-08-30 00:45:52,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:52,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:45:52,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:45:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:45:52,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 00:45:52,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:52,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:52,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 00:45:52,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:53,110 INFO L130 PetriNetUnfolder]: 2000/2483 cut-off events. [2023-08-30 00:45:53,110 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:45:53,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4984 conditions, 2483 events. 2000/2483 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8348 event pairs, 933 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 4980. Up to 2452 conditions per place. [2023-08-30 00:45:53,122 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 00:45:53,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-08-30 00:45:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-30 00:45:53,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46642685851318944 [2023-08-30 00:45:53,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-30 00:45:53,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-30 00:45:53,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:53,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-30 00:45:53,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,126 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 389 transitions. [2023-08-30 00:45:53,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-08-30 00:45:53,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:53,127 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-08-30 00:45:53,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-30 00:45:53,128 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 00:45:53,128 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-08-30 00:45:53,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:53,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:53,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 00:45:53,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:53,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2039006695, now seen corresponding path program 1 times [2023-08-30 00:45:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473952628] [2023-08-30 00:45:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:53,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:53,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473952628] [2023-08-30 00:45:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473952628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:53,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:53,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:45:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719907583] [2023-08-30 00:45:53,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:45:53,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:45:53,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:45:53,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 278 [2023-08-30 00:45:53,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:53,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 278 [2023-08-30 00:45:53,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:53,415 INFO L130 PetriNetUnfolder]: 1586/1988 cut-off events. [2023-08-30 00:45:53,415 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:45:53,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 1988 events. 1586/1988 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6524 event pairs, 735 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 3991. Up to 1957 conditions per place. [2023-08-30 00:45:53,425 INFO L137 encePairwiseOnDemand]: 276/278 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 00:45:53,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-08-30 00:45:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-30 00:45:53,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568345323741007 [2023-08-30 00:45:53,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-30 00:45:53,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-30 00:45:53,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:53,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-30 00:45:53,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,429 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 381 transitions. [2023-08-30 00:45:53,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-08-30 00:45:53,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:53,430 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-08-30 00:45:53,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 00:45:53,432 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 00:45:53,433 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-08-30 00:45:53,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:53,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:53,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 00:45:53,433 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:53,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:53,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2039006694, now seen corresponding path program 1 times [2023-08-30 00:45:53,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:53,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622373515] [2023-08-30 00:45:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:53,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:53,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622373515] [2023-08-30 00:45:53,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622373515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:53,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:53,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:45:53,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589488369] [2023-08-30 00:45:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:53,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:45:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:53,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:45:53,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:45:53,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 278 [2023-08-30 00:45:53,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:53,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 278 [2023-08-30 00:45:53,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:53,725 INFO L130 PetriNetUnfolder]: 1172/1493 cut-off events. [2023-08-30 00:45:53,725 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:45:53,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 1493 events. 1172/1493 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4782 event pairs, 537 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 3002. Up to 1462 conditions per place. [2023-08-30 00:45:53,731 INFO L137 encePairwiseOnDemand]: 276/278 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 00:45:53,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-08-30 00:45:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-08-30 00:45:53,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196642685851319 [2023-08-30 00:45:53,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-08-30 00:45:53,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-08-30 00:45:53,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:53,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-08-30 00:45:53,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,734 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 350 transitions. [2023-08-30 00:45:53,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-08-30 00:45:53,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:53,735 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-08-30 00:45:53,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 00:45:53,736 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 00:45:53,736 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-08-30 00:45:53,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:53,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:53,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 00:45:53,736 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:53,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2084028512, now seen corresponding path program 1 times [2023-08-30 00:45:53,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:53,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508618608] [2023-08-30 00:45:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:53,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:45:53,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:53,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508618608] [2023-08-30 00:45:53,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508618608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:53,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:53,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:45:53,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309835938] [2023-08-30 00:45:53,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:53,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:45:53,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:45:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:45:53,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 278 [2023-08-30 00:45:53,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:53,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 278 [2023-08-30 00:45:53,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:53,988 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2023-08-30 00:45:53,989 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 00:45:53,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3516 conditions, 1736 events. 1343/1736 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5871 event pairs, 215 based on Foata normal form. 1/1043 useless extension candidates. Maximal degree in co-relation 3512. Up to 1515 conditions per place. [2023-08-30 00:45:53,995 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-08-30 00:45:53,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 212 flow [2023-08-30 00:45:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:45:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:45:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-30 00:45:53,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179856115107914 [2023-08-30 00:45:53,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-30 00:45:53,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-30 00:45:53,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:53,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-30 00:45:53,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:53,999 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 432 transitions. [2023-08-30 00:45:53,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 212 flow [2023-08-30 00:45:53,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:54,000 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 97 flow [2023-08-30 00:45:54,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 00:45:54,000 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 00:45:54,000 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 97 flow [2023-08-30 00:45:54,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:54,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:54,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 00:45:54,001 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:54,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1296728902, now seen corresponding path program 1 times [2023-08-30 00:45:54,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:54,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544465043] [2023-08-30 00:45:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:54,091 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 00:45:54,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:54,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544465043] [2023-08-30 00:45:54,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544465043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:54,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:54,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:45:54,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746881709] [2023-08-30 00:45:54,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:54,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:45:54,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:54,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:45:54,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:45:54,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 00:45:54,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:54,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 00:45:54,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:54,359 INFO L130 PetriNetUnfolder]: 1964/2742 cut-off events. [2023-08-30 00:45:54,359 INFO L131 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2023-08-30 00:45:54,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6376 conditions, 2742 events. 1964/2742 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12439 event pairs, 503 based on Foata normal form. 304/2992 useless extension candidates. Maximal degree in co-relation 6371. Up to 1387 conditions per place. [2023-08-30 00:45:54,371 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 74 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2023-08-30 00:45:54,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 82 transitions, 392 flow [2023-08-30 00:45:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:45:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:45:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2023-08-30 00:45:54,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906474820143885 [2023-08-30 00:45:54,373 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2023-08-30 00:45:54,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2023-08-30 00:45:54,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:54,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2023-08-30 00:45:54,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,376 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,376 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 97 flow. Second operand 5 states and 682 transitions. [2023-08-30 00:45:54,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 82 transitions, 392 flow [2023-08-30 00:45:54,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:54,378 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 142 flow [2023-08-30 00:45:54,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-30 00:45:54,379 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-08-30 00:45:54,379 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 142 flow [2023-08-30 00:45:54,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:54,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:54,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 00:45:54,380 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:54,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1396144016, now seen corresponding path program 2 times [2023-08-30 00:45:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:54,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845893570] [2023-08-30 00:45:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:54,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:54,441 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 00:45:54,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:54,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845893570] [2023-08-30 00:45:54,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845893570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:54,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:54,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:45:54,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410177187] [2023-08-30 00:45:54,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:54,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:45:54,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:54,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:45:54,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:45:54,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-08-30 00:45:54,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:54,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-08-30 00:45:54,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:54,658 INFO L130 PetriNetUnfolder]: 1807/2576 cut-off events. [2023-08-30 00:45:54,658 INFO L131 PetriNetUnfolder]: For 3111/3434 co-relation queries the response was YES. [2023-08-30 00:45:54,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 2576 events. 1807/2576 cut-off events. For 3111/3434 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12028 event pairs, 523 based on Foata normal form. 397/2926 useless extension candidates. Maximal degree in co-relation 7762. Up to 1640 conditions per place. [2023-08-30 00:45:54,670 INFO L137 encePairwiseOnDemand]: 274/278 looper letters, 54 selfloop transitions, 4 changer transitions 7/69 dead transitions. [2023-08-30 00:45:54,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 389 flow [2023-08-30 00:45:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:45:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:45:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-30 00:45:54,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-08-30 00:45:54,672 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-30 00:45:54,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-30 00:45:54,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:54,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-30 00:45:54,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,674 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,675 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 142 flow. Second operand 4 states and 550 transitions. [2023-08-30 00:45:54,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 389 flow [2023-08-30 00:45:54,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 382 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:54,677 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 168 flow [2023-08-30 00:45:54,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2023-08-30 00:45:54,678 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-08-30 00:45:54,678 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 168 flow [2023-08-30 00:45:54,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:54,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:54,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 00:45:54,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:54,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:54,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1002958456, now seen corresponding path program 3 times [2023-08-30 00:45:54,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:54,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519976247] [2023-08-30 00:45:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:54,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:54,752 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 00:45:54,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519976247] [2023-08-30 00:45:54,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519976247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:54,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:54,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:45:54,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85342420] [2023-08-30 00:45:54,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:54,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:45:54,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:45:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:45:54,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 00:45:54,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:54,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:54,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 00:45:54,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:55,111 INFO L130 PetriNetUnfolder]: 2101/3191 cut-off events. [2023-08-30 00:45:55,112 INFO L131 PetriNetUnfolder]: For 7172/7798 co-relation queries the response was YES. [2023-08-30 00:45:55,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9834 conditions, 3191 events. 2101/3191 cut-off events. For 7172/7798 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16380 event pairs, 795 based on Foata normal form. 782/3948 useless extension candidates. Maximal degree in co-relation 9824. Up to 1821 conditions per place. [2023-08-30 00:45:55,126 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 78 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-08-30 00:45:55,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 539 flow [2023-08-30 00:45:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:45:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:45:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 674 transitions. [2023-08-30 00:45:55,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4848920863309353 [2023-08-30 00:45:55,128 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 674 transitions. [2023-08-30 00:45:55,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 674 transitions. [2023-08-30 00:45:55,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:55,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 674 transitions. [2023-08-30 00:45:55,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,132 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,132 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 168 flow. Second operand 5 states and 674 transitions. [2023-08-30 00:45:55,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 539 flow [2023-08-30 00:45:55,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 531 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:55,137 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 236 flow [2023-08-30 00:45:55,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-30 00:45:55,137 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-30 00:45:55,137 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 236 flow [2023-08-30 00:45:55,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:55,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:55,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 00:45:55,138 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:55,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:55,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1261806454, now seen corresponding path program 4 times [2023-08-30 00:45:55,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:55,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731450408] [2023-08-30 00:45:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:55,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:55,224 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 00:45:55,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:55,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731450408] [2023-08-30 00:45:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731450408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:55,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:45:55,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501027716] [2023-08-30 00:45:55,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:55,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:45:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:45:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:45:55,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-08-30 00:45:55,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:55,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-08-30 00:45:55,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:55,512 INFO L130 PetriNetUnfolder]: 2291/3471 cut-off events. [2023-08-30 00:45:55,512 INFO L131 PetriNetUnfolder]: For 13548/14183 co-relation queries the response was YES. [2023-08-30 00:45:55,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13309 conditions, 3471 events. 2291/3471 cut-off events. For 13548/14183 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18061 event pairs, 795 based on Foata normal form. 652/4013 useless extension candidates. Maximal degree in co-relation 13296. Up to 1589 conditions per place. [2023-08-30 00:45:55,532 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 63 selfloop transitions, 10 changer transitions 1/81 dead transitions. [2023-08-30 00:45:55,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 621 flow [2023-08-30 00:45:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:45:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:45:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-30 00:45:55,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-08-30 00:45:55,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-30 00:45:55,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-30 00:45:55,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:55,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-30 00:45:55,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,538 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,538 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 236 flow. Second operand 4 states and 550 transitions. [2023-08-30 00:45:55,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 621 flow [2023-08-30 00:45:55,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 611 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:55,549 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 377 flow [2023-08-30 00:45:55,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=377, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-08-30 00:45:55,550 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-30 00:45:55,550 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 377 flow [2023-08-30 00:45:55,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:55,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:55,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 00:45:55,551 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:55,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash 631474676, now seen corresponding path program 5 times [2023-08-30 00:45:55,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:55,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323843132] [2023-08-30 00:45:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:55,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:55,634 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 00:45:55,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:55,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323843132] [2023-08-30 00:45:55,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323843132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:55,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:55,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:45:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464475087] [2023-08-30 00:45:55,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:55,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:45:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:45:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:45:55,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-08-30 00:45:55,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:55,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-08-30 00:45:55,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:55,918 INFO L130 PetriNetUnfolder]: 2297/3339 cut-off events. [2023-08-30 00:45:55,918 INFO L131 PetriNetUnfolder]: For 17091/17811 co-relation queries the response was YES. [2023-08-30 00:45:55,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 3339 events. 2297/3339 cut-off events. For 17091/17811 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 16169 event pairs, 647 based on Foata normal form. 725/3981 useless extension candidates. Maximal degree in co-relation 14966. Up to 1928 conditions per place. [2023-08-30 00:45:55,936 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 61 selfloop transitions, 7 changer transitions 10/83 dead transitions. [2023-08-30 00:45:55,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 693 flow [2023-08-30 00:45:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:45:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:45:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-30 00:45:55,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-08-30 00:45:55,938 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-30 00:45:55,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-30 00:45:55,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:55,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-30 00:45:55,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,941 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,941 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 377 flow. Second operand 4 states and 550 transitions. [2023-08-30 00:45:55,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 693 flow [2023-08-30 00:45:55,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 654 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:55,955 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 368 flow [2023-08-30 00:45:55,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=368, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-30 00:45:55,956 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-30 00:45:55,956 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 368 flow [2023-08-30 00:45:55,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:55,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:55,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:55,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 00:45:55,957 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:55,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash 456940982, now seen corresponding path program 1 times [2023-08-30 00:45:55,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:55,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197007868] [2023-08-30 00:45:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:55,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:45:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197007868] [2023-08-30 00:45:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197007868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:56,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:56,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:45:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376180338] [2023-08-30 00:45:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:56,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:45:56,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:45:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:45:56,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 00:45:56,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 368 flow. Second operand has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:56,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:56,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 00:45:56,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:56,478 INFO L130 PetriNetUnfolder]: 3037/4299 cut-off events. [2023-08-30 00:45:56,479 INFO L131 PetriNetUnfolder]: For 31811/32782 co-relation queries the response was YES. [2023-08-30 00:45:56,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18865 conditions, 4299 events. 3037/4299 cut-off events. For 31811/32782 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21100 event pairs, 1125 based on Foata normal form. 1145/5353 useless extension candidates. Maximal degree in co-relation 18848. Up to 3011 conditions per place. [2023-08-30 00:45:56,498 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 79 selfloop transitions, 7 changer transitions 12/101 dead transitions. [2023-08-30 00:45:56,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 101 transitions, 872 flow [2023-08-30 00:45:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:45:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:45:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-08-30 00:45:56,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841726618705036 [2023-08-30 00:45:56,500 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-08-30 00:45:56,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-08-30 00:45:56,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:56,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-08-30 00:45:56,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:56,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:56,504 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:56,504 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 368 flow. Second operand 5 states and 673 transitions. [2023-08-30 00:45:56,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 101 transitions, 872 flow [2023-08-30 00:45:56,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 101 transitions, 830 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 00:45:56,512 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 427 flow [2023-08-30 00:45:56,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-08-30 00:45:56,513 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2023-08-30 00:45:56,513 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 427 flow [2023-08-30 00:45:56,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:56,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:56,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:56,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 00:45:56,514 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:56,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:56,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1078285420, now seen corresponding path program 1 times [2023-08-30 00:45:56,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:56,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315375920] [2023-08-30 00:45:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:56,601 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 00:45:56,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:56,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315375920] [2023-08-30 00:45:56,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315375920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:45:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338939927] [2023-08-30 00:45:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:56,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:45:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:45:56,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:45:56,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 00:45:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:56,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:45:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:45:56,759 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 00:45:56,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:45:56,831 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 00:45:56,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338939927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:45:56,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:45:56,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 00:45:56,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424884782] [2023-08-30 00:45:56,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:45:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 00:45:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 00:45:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 00:45:56,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-08-30 00:45:56,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 427 flow. Second operand has 11 states, 11 states have (on average 120.0) internal successors, (1320), 11 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:56,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:56,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-08-30 00:45:56,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:57,685 INFO L130 PetriNetUnfolder]: 5106/6928 cut-off events. [2023-08-30 00:45:57,686 INFO L131 PetriNetUnfolder]: For 51387/51980 co-relation queries the response was YES. [2023-08-30 00:45:57,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36586 conditions, 6928 events. 5106/6928 cut-off events. For 51387/51980 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31389 event pairs, 1032 based on Foata normal form. 1120/8038 useless extension candidates. Maximal degree in co-relation 36568. Up to 3307 conditions per place. [2023-08-30 00:45:57,738 INFO L137 encePairwiseOnDemand]: 269/278 looper letters, 143 selfloop transitions, 37 changer transitions 14/196 dead transitions. [2023-08-30 00:45:57,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 196 transitions, 1934 flow [2023-08-30 00:45:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:45:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:45:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1421 transitions. [2023-08-30 00:45:57,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646827992151733 [2023-08-30 00:45:57,742 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1421 transitions. [2023-08-30 00:45:57,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1421 transitions. [2023-08-30 00:45:57,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:57,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1421 transitions. [2023-08-30 00:45:57,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 129.1818181818182) internal successors, (1421), 11 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:57,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 278.0) internal successors, (3336), 12 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:57,748 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 278.0) internal successors, (3336), 12 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:57,748 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 427 flow. Second operand 11 states and 1421 transitions. [2023-08-30 00:45:57,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 196 transitions, 1934 flow [2023-08-30 00:45:57,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 196 transitions, 1787 flow, removed 66 selfloop flow, removed 2 redundant places. [2023-08-30 00:45:57,782 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 820 flow [2023-08-30 00:45:57,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=820, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-30 00:45:57,783 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2023-08-30 00:45:57,783 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 820 flow [2023-08-30 00:45:57,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.0) internal successors, (1320), 11 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:57,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:57,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:57,795 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 00:45:57,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 00:45:57,985 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:57,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:57,985 INFO L85 PathProgramCache]: Analyzing trace with hash -829438692, now seen corresponding path program 2 times [2023-08-30 00:45:57,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:57,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426851275] [2023-08-30 00:45:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:57,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:45:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426851275] [2023-08-30 00:45:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426851275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:45:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784895878] [2023-08-30 00:45:58,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:45:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:45:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:45:58,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-08-30 00:45:58,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 820 flow. Second operand has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:58,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:58,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-08-30 00:45:58,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:58,679 INFO L130 PetriNetUnfolder]: 4711/6351 cut-off events. [2023-08-30 00:45:58,679 INFO L131 PetriNetUnfolder]: For 66535/67770 co-relation queries the response was YES. [2023-08-30 00:45:58,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37627 conditions, 6351 events. 4711/6351 cut-off events. For 66535/67770 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 28627 event pairs, 1915 based on Foata normal form. 1033/7221 useless extension candidates. Maximal degree in co-relation 37604. Up to 5558 conditions per place. [2023-08-30 00:45:58,730 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 78 selfloop transitions, 17 changer transitions 7/108 dead transitions. [2023-08-30 00:45:58,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 1329 flow [2023-08-30 00:45:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:45:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:45:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-08-30 00:45:58,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46690647482014386 [2023-08-30 00:45:58,732 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-08-30 00:45:58,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-08-30 00:45:58,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:58,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-08-30 00:45:58,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:58,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:58,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:58,735 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 820 flow. Second operand 5 states and 649 transitions. [2023-08-30 00:45:58,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 1329 flow [2023-08-30 00:45:58,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 1150 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-30 00:45:58,777 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 780 flow [2023-08-30 00:45:58,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=780, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-30 00:45:58,777 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2023-08-30 00:45:58,777 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 780 flow [2023-08-30 00:45:58,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:58,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:58,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:58,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 00:45:58,778 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:58,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1491670694, now seen corresponding path program 3 times [2023-08-30 00:45:58,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:58,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542971342] [2023-08-30 00:45:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:58,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:45:58,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:58,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542971342] [2023-08-30 00:45:58,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542971342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:45:58,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:45:58,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:45:58,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566625354] [2023-08-30 00:45:58,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:45:58,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:45:58,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:45:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:45:58,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 00:45:58,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 780 flow. Second operand has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:58,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:58,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 00:45:58,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:45:59,310 INFO L130 PetriNetUnfolder]: 4234/5660 cut-off events. [2023-08-30 00:45:59,310 INFO L131 PetriNetUnfolder]: For 48413/49431 co-relation queries the response was YES. [2023-08-30 00:45:59,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32009 conditions, 5660 events. 4234/5660 cut-off events. For 48413/49431 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 24820 event pairs, 1362 based on Foata normal form. 907/6442 useless extension candidates. Maximal degree in co-relation 31987. Up to 4090 conditions per place. [2023-08-30 00:45:59,348 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 74 selfloop transitions, 18 changer transitions 11/109 dead transitions. [2023-08-30 00:45:59,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 109 transitions, 1196 flow [2023-08-30 00:45:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:45:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:45:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-30 00:45:59,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47050359712230216 [2023-08-30 00:45:59,350 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-30 00:45:59,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-30 00:45:59,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:45:59,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-30 00:45:59,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:59,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:59,358 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:59,358 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 780 flow. Second operand 5 states and 654 transitions. [2023-08-30 00:45:59,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 109 transitions, 1196 flow [2023-08-30 00:45:59,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 1169 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:45:59,403 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 820 flow [2023-08-30 00:45:59,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=820, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-30 00:45:59,403 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2023-08-30 00:45:59,403 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 820 flow [2023-08-30 00:45:59,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:59,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:45:59,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:45:59,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 00:45:59,404 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:45:59,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:45:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash 756304230, now seen corresponding path program 1 times [2023-08-30 00:45:59,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:45:59,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521984119] [2023-08-30 00:45:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:59,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:45:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:45:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:45:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521984119] [2023-08-30 00:45:59,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521984119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:45:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451159481] [2023-08-30 00:45:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:45:59,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:45:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:45:59,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:45:59,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 00:45:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:45:59,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:45:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:45:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:45:59,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:45:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:45:59,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451159481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:45:59,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:45:59,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-30 00:45:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493265460] [2023-08-30 00:45:59,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:45:59,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:45:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:45:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:45:59,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:45:59,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-08-30 00:45:59,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 820 flow. Second operand has 7 states, 7 states have (on average 124.85714285714286) internal successors, (874), 7 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:45:59,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:45:59,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-08-30 00:45:59,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:46:00,479 INFO L130 PetriNetUnfolder]: 5872/7758 cut-off events. [2023-08-30 00:46:00,479 INFO L131 PetriNetUnfolder]: For 72013/72996 co-relation queries the response was YES. [2023-08-30 00:46:00,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45975 conditions, 7758 events. 5872/7758 cut-off events. For 72013/72996 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33772 event pairs, 1414 based on Foata normal form. 1008/8716 useless extension candidates. Maximal degree in co-relation 45950. Up to 4590 conditions per place. [2023-08-30 00:46:00,539 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 146 selfloop transitions, 66 changer transitions 3/221 dead transitions. [2023-08-30 00:46:00,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 221 transitions, 2703 flow [2023-08-30 00:46:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:46:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:46:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1055 transitions. [2023-08-30 00:46:00,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743705035971223 [2023-08-30 00:46:00,544 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1055 transitions. [2023-08-30 00:46:00,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1055 transitions. [2023-08-30 00:46:00,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:46:00,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1055 transitions. [2023-08-30 00:46:00,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.875) internal successors, (1055), 8 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:00,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 278.0) internal successors, (2502), 9 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:00,549 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 278.0) internal successors, (2502), 9 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:00,549 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 820 flow. Second operand 8 states and 1055 transitions. [2023-08-30 00:46:00,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 221 transitions, 2703 flow [2023-08-30 00:46:00,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 221 transitions, 2589 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-30 00:46:00,630 INFO L231 Difference]: Finished difference. Result has 87 places, 126 transitions, 1630 flow [2023-08-30 00:46:00,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1630, PETRI_PLACES=87, PETRI_TRANSITIONS=126} [2023-08-30 00:46:00,630 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2023-08-30 00:46:00,631 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 126 transitions, 1630 flow [2023-08-30 00:46:00,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.85714285714286) internal successors, (874), 7 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:00,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:46:00,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:46:00,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:46:00,835 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,SelfDestructingSolverStorable19 [2023-08-30 00:46:00,836 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:46:00,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:46:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash 661390484, now seen corresponding path program 2 times [2023-08-30 00:46:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:46:00,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795715479] [2023-08-30 00:46:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:46:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:46:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:46:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:46:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:46:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795715479] [2023-08-30 00:46:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795715479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:46:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660535774] [2023-08-30 00:46:00,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:46:00,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:46:00,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:46:00,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:46:00,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 00:46:01,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:46:01,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:46:01,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:46:01,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:46:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:46:01,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:46:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:46:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660535774] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:46:01,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:46:01,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 00:46:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298004585] [2023-08-30 00:46:01,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:46:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:46:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:46:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:46:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:46:01,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-08-30 00:46:01,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 126 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 123.375) internal successors, (987), 8 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:01,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:46:01,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-08-30 00:46:01,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:46:01,834 INFO L130 PetriNetUnfolder]: 6144/8011 cut-off events. [2023-08-30 00:46:01,834 INFO L131 PetriNetUnfolder]: For 91022/91991 co-relation queries the response was YES. [2023-08-30 00:46:01,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51944 conditions, 8011 events. 6144/8011 cut-off events. For 91022/91991 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 33998 event pairs, 1128 based on Foata normal form. 1034/9022 useless extension candidates. Maximal degree in co-relation 51917. Up to 4791 conditions per place. [2023-08-30 00:46:01,898 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 106 selfloop transitions, 97 changer transitions 2/211 dead transitions. [2023-08-30 00:46:01,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 211 transitions, 3002 flow [2023-08-30 00:46:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:46:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:46:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 789 transitions. [2023-08-30 00:46:01,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47302158273381295 [2023-08-30 00:46:01,900 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 789 transitions. [2023-08-30 00:46:01,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 789 transitions. [2023-08-30 00:46:01,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:46:01,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 789 transitions. [2023-08-30 00:46:01,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.5) internal successors, (789), 6 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:01,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:01,903 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:01,904 INFO L175 Difference]: Start difference. First operand has 87 places, 126 transitions, 1630 flow. Second operand 6 states and 789 transitions. [2023-08-30 00:46:01,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 211 transitions, 3002 flow [2023-08-30 00:46:02,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 211 transitions, 2974 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-08-30 00:46:02,029 INFO L231 Difference]: Finished difference. Result has 95 places, 165 transitions, 2522 flow [2023-08-30 00:46:02,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2522, PETRI_PLACES=95, PETRI_TRANSITIONS=165} [2023-08-30 00:46:02,029 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2023-08-30 00:46:02,029 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 165 transitions, 2522 flow [2023-08-30 00:46:02,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.375) internal successors, (987), 8 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:02,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:46:02,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:46:02,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:46:02,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:46:02,235 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:46:02,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:46:02,235 INFO L85 PathProgramCache]: Analyzing trace with hash -261321058, now seen corresponding path program 1 times [2023-08-30 00:46:02,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:46:02,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066494237] [2023-08-30 00:46:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:46:02,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:46:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:46:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:46:02,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:46:02,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066494237] [2023-08-30 00:46:02,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066494237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:46:02,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045641024] [2023-08-30 00:46:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:46:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:46:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:46:02,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:46:02,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 00:46:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:46:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:46:02,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:46:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:46:02,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:46:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:46:02,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045641024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:46:02,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:46:02,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-08-30 00:46:02,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837905281] [2023-08-30 00:46:02,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:46:02,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:46:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:46:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:46:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:46:02,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 278 [2023-08-30 00:46:02,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 165 transitions, 2522 flow. Second operand has 12 states, 12 states have (on average 121.83333333333333) internal successors, (1462), 12 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:02,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:46:02,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 278 [2023-08-30 00:46:02,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:46:04,608 INFO L130 PetriNetUnfolder]: 12474/16661 cut-off events. [2023-08-30 00:46:04,608 INFO L131 PetriNetUnfolder]: For 245920/249917 co-relation queries the response was YES. [2023-08-30 00:46:04,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116865 conditions, 16661 events. 12474/16661 cut-off events. For 245920/249917 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 84355 event pairs, 1184 based on Foata normal form. 3518/19527 useless extension candidates. Maximal degree in co-relation 116834. Up to 9573 conditions per place. [2023-08-30 00:46:04,798 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 180 selfloop transitions, 179 changer transitions 3/373 dead transitions. [2023-08-30 00:46:04,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 373 transitions, 5972 flow [2023-08-30 00:46:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:46:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:46:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 811 transitions. [2023-08-30 00:46:04,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4862110311750599 [2023-08-30 00:46:04,800 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 811 transitions. [2023-08-30 00:46:04,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 811 transitions. [2023-08-30 00:46:04,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:46:04,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 811 transitions. [2023-08-30 00:46:04,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.16666666666666) internal successors, (811), 6 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:04,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:04,803 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:04,804 INFO L175 Difference]: Start difference. First operand has 95 places, 165 transitions, 2522 flow. Second operand 6 states and 811 transitions. [2023-08-30 00:46:04,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 373 transitions, 5972 flow [2023-08-30 00:46:05,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 373 transitions, 5373 flow, removed 198 selfloop flow, removed 4 redundant places. [2023-08-30 00:46:05,028 INFO L231 Difference]: Finished difference. Result has 99 places, 305 transitions, 5241 flow [2023-08-30 00:46:05,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5241, PETRI_PLACES=99, PETRI_TRANSITIONS=305} [2023-08-30 00:46:05,028 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2023-08-30 00:46:05,029 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 305 transitions, 5241 flow [2023-08-30 00:46:05,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 121.83333333333333) internal successors, (1462), 12 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:05,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:46:05,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:46:05,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 00:46:05,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:46:05,234 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:46:05,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:46:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1861405730, now seen corresponding path program 2 times [2023-08-30 00:46:05,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:46:05,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815215623] [2023-08-30 00:46:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:46:05,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:46:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:46:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:46:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:46:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815215623] [2023-08-30 00:46:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815215623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:46:05,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270508764] [2023-08-30 00:46:05,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:46:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:46:05,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:46:05,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:46:05,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 00:46:05,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:46:05,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:46:05,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:46:05,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:46:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:46:05,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:46:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:46:05,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270508764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:46:05,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:46:05,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2023-08-30 00:46:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744477128] [2023-08-30 00:46:05,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:46:05,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:46:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:46:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:46:05,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:46:06,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 278 [2023-08-30 00:46:06,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 305 transitions, 5241 flow. Second operand has 17 states, 17 states have (on average 117.70588235294117) internal successors, (2001), 17 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:06,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:46:06,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 278 [2023-08-30 00:46:06,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:46:12,116 INFO L130 PetriNetUnfolder]: 31868/43369 cut-off events. [2023-08-30 00:46:12,116 INFO L131 PetriNetUnfolder]: For 680915/688871 co-relation queries the response was YES. [2023-08-30 00:46:12,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313847 conditions, 43369 events. 31868/43369 cut-off events. For 680915/688871 co-relation queries the response was YES. Maximal size of possible extension queue 1896. Compared 257993 event pairs, 1801 based on Foata normal form. 6442/49280 useless extension candidates. Maximal degree in co-relation 313814. Up to 22929 conditions per place. [2023-08-30 00:46:12,642 INFO L137 encePairwiseOnDemand]: 268/278 looper letters, 334 selfloop transitions, 769 changer transitions 6/1118 dead transitions. [2023-08-30 00:46:12,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1118 transitions, 18698 flow [2023-08-30 00:46:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 00:46:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 00:46:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2732 transitions. [2023-08-30 00:46:12,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679684823569716 [2023-08-30 00:46:12,647 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2732 transitions. [2023-08-30 00:46:12,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2732 transitions. [2023-08-30 00:46:12,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:46:12,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2732 transitions. [2023-08-30 00:46:12,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 130.0952380952381) internal successors, (2732), 21 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:12,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 278.0) internal successors, (6116), 22 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:12,658 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 278.0) internal successors, (6116), 22 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:12,658 INFO L175 Difference]: Start difference. First operand has 99 places, 305 transitions, 5241 flow. Second operand 21 states and 2732 transitions. [2023-08-30 00:46:12,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 1118 transitions, 18698 flow [2023-08-30 00:46:13,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 1118 transitions, 17932 flow, removed 383 selfloop flow, removed 0 redundant places. [2023-08-30 00:46:13,970 INFO L231 Difference]: Finished difference. Result has 125 places, 893 transitions, 17296 flow [2023-08-30 00:46:13,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=4839, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=17296, PETRI_PLACES=125, PETRI_TRANSITIONS=893} [2023-08-30 00:46:13,971 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2023-08-30 00:46:13,971 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 893 transitions, 17296 flow [2023-08-30 00:46:13,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 117.70588235294117) internal successors, (2001), 17 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:13,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:46:13,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:46:13,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:46:14,195 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,SelfDestructingSolverStorable22 [2023-08-30 00:46:14,195 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:46:14,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:46:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1379169044, now seen corresponding path program 3 times [2023-08-30 00:46:14,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:46:14,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450950473] [2023-08-30 00:46:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:46:14,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:46:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:46:14,351 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 00:46:14,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:46:14,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450950473] [2023-08-30 00:46:14,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450950473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:46:14,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622482062] [2023-08-30 00:46:14,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:46:14,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:46:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:46:14,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:46:14,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 00:46:14,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:46:14,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:46:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:46:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:46:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:46:14,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:46:14,626 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 00:46:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622482062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:46:14,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:46:14,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 00:46:14,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039254143] [2023-08-30 00:46:14,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:46:14,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:46:14,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:46:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:46:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:46:14,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 278 [2023-08-30 00:46:14,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 893 transitions, 17296 flow. Second operand has 12 states, 12 states have (on average 124.5) internal successors, (1494), 12 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:14,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:46:14,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 278 [2023-08-30 00:46:14,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:46:25,839 INFO L130 PetriNetUnfolder]: 45529/63213 cut-off events. [2023-08-30 00:46:25,840 INFO L131 PetriNetUnfolder]: For 1292498/1299909 co-relation queries the response was YES. [2023-08-30 00:46:26,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481827 conditions, 63213 events. 45529/63213 cut-off events. For 1292498/1299909 co-relation queries the response was YES. Maximal size of possible extension queue 2774. Compared 414919 event pairs, 5762 based on Foata normal form. 7252/70031 useless extension candidates. Maximal degree in co-relation 481787. Up to 26483 conditions per place. [2023-08-30 00:46:26,698 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 1478 selfloop transitions, 525 changer transitions 287/2298 dead transitions. [2023-08-30 00:46:26,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 2298 transitions, 46870 flow [2023-08-30 00:46:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:46:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:46:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1619 transitions. [2023-08-30 00:46:26,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48531175059952036 [2023-08-30 00:46:26,707 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1619 transitions. [2023-08-30 00:46:26,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1619 transitions. [2023-08-30 00:46:26,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:46:26,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1619 transitions. [2023-08-30 00:46:26,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.91666666666666) internal successors, (1619), 12 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 00:46:26,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 278.0) internal successors, (3614), 13 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:26,713 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 278.0) internal successors, (3614), 13 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:26,713 INFO L175 Difference]: Start difference. First operand has 125 places, 893 transitions, 17296 flow. Second operand 12 states and 1619 transitions. [2023-08-30 00:46:26,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 2298 transitions, 46870 flow [2023-08-30 00:46:37,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 2298 transitions, 38513 flow, removed 4139 selfloop flow, removed 1 redundant places. [2023-08-30 00:46:37,557 INFO L231 Difference]: Finished difference. Result has 141 places, 1145 transitions, 20108 flow [2023-08-30 00:46:37,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=13798, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20108, PETRI_PLACES=141, PETRI_TRANSITIONS=1145} [2023-08-30 00:46:37,558 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2023-08-30 00:46:37,558 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 1145 transitions, 20108 flow [2023-08-30 00:46:37,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 124.5) internal successors, (1494), 12 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:37,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:46:37,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:46:37,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:46:37,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:46:37,764 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:46:37,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:46:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash 377423300, now seen corresponding path program 4 times [2023-08-30 00:46:37,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:46:37,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535080745] [2023-08-30 00:46:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:46:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:46:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:46:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:46:37,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:46:37,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535080745] [2023-08-30 00:46:37,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535080745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:46:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827445282] [2023-08-30 00:46:37,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:46:37,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:46:37,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:46:37,910 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:46:37,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 00:46:38,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:46:38,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:46:38,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:46:38,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:46:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:46:38,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:46:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:46:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827445282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:46:38,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:46:38,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 00:46:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182902222] [2023-08-30 00:46:38,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:46:38,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:46:38,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:46:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:46:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:46:38,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-08-30 00:46:38,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 1145 transitions, 20108 flow. Second operand has 15 states, 15 states have (on average 120.46666666666667) internal successors, (1807), 15 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:46:38,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:46:38,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-08-30 00:46:38,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:04,869 INFO L130 PetriNetUnfolder]: 93996/129885 cut-off events. [2023-08-30 00:47:04,870 INFO L131 PetriNetUnfolder]: For 2238021/2244344 co-relation queries the response was YES. [2023-08-30 00:47:06,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954958 conditions, 129885 events. 93996/129885 cut-off events. For 2238021/2244344 co-relation queries the response was YES. Maximal size of possible extension queue 4649. Compared 889580 event pairs, 11677 based on Foata normal form. 15584/145018 useless extension candidates. Maximal degree in co-relation 954912. Up to 44303 conditions per place. [2023-08-30 00:47:06,667 INFO L137 encePairwiseOnDemand]: 268/278 looper letters, 2437 selfloop transitions, 1455 changer transitions 20/3917 dead transitions. [2023-08-30 00:47:06,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 3917 transitions, 71949 flow [2023-08-30 00:47:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 00:47:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 00:47:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5323 transitions. [2023-08-30 00:47:06,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46701175644849974 [2023-08-30 00:47:06,689 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5323 transitions. [2023-08-30 00:47:06,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5323 transitions. [2023-08-30 00:47:06,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:06,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5323 transitions. [2023-08-30 00:47:06,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 129.82926829268294) internal successors, (5323), 41 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:06,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 278.0) internal successors, (11676), 42 states have internal predecessors, (11676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:06,718 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 278.0) internal successors, (11676), 42 states have internal predecessors, (11676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:06,718 INFO L175 Difference]: Start difference. First operand has 141 places, 1145 transitions, 20108 flow. Second operand 41 states and 5323 transitions. [2023-08-30 00:47:06,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 3917 transitions, 71949 flow [2023-08-30 00:47:38,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 3917 transitions, 70991 flow, removed 479 selfloop flow, removed 2 redundant places. [2023-08-30 00:47:38,679 INFO L231 Difference]: Finished difference. Result has 208 places, 2413 transitions, 50679 flow [2023-08-30 00:47:38,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=19712, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=50679, PETRI_PLACES=208, PETRI_TRANSITIONS=2413} [2023-08-30 00:47:38,680 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 153 predicate places. [2023-08-30 00:47:38,680 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 2413 transitions, 50679 flow [2023-08-30 00:47:38,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.46666666666667) internal successors, (1807), 15 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:38,681 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:38,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:47:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:38,886 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:47:38,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1856691398, now seen corresponding path program 5 times [2023-08-30 00:47:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:38,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349615238] [2023-08-30 00:47:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:38,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:39,062 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 00:47:39,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:39,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349615238] [2023-08-30 00:47:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349615238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:39,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465721213] [2023-08-30 00:47:39,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:47:39,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:39,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:39,064 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:47:39,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 00:47:39,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:47:39,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:47:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:47:39,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:39,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:47:39,321 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 00:47:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465721213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:47:39,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:47:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2023-08-30 00:47:39,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101608897] [2023-08-30 00:47:39,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:47:39,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:47:39,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:47:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:47:39,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-08-30 00:47:39,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 2413 transitions, 50679 flow. Second operand has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:39,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-08-30 00:47:39,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:02,514 INFO L130 PetriNetUnfolder]: 162180/227131 cut-off events. [2023-08-30 00:49:02,514 INFO L131 PetriNetUnfolder]: For 8958016/8962551 co-relation queries the response was YES. [2023-08-30 00:49:06,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2193226 conditions, 227131 events. 162180/227131 cut-off events. For 8958016/8962551 co-relation queries the response was YES. Maximal size of possible extension queue 8225. Compared 1706733 event pairs, 17864 based on Foata normal form. 5857/232934 useless extension candidates. Maximal degree in co-relation 2193150. Up to 71568 conditions per place. [2023-08-30 00:49:07,389 INFO L137 encePairwiseOnDemand]: 270/278 looper letters, 4716 selfloop transitions, 1304 changer transitions 13/6049 dead transitions. [2023-08-30 00:49:07,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 6049 transitions, 139842 flow [2023-08-30 00:49:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:49:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:49:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1961 transitions. [2023-08-30 00:49:07,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702637889688249 [2023-08-30 00:49:07,392 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1961 transitions. [2023-08-30 00:49:07,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1961 transitions. [2023-08-30 00:49:07,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:07,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1961 transitions. [2023-08-30 00:49:07,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 130.73333333333332) internal successors, (1961), 15 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:07,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 278.0) internal successors, (4448), 16 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:07,397 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 278.0) internal successors, (4448), 16 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:07,398 INFO L175 Difference]: Start difference. First operand has 208 places, 2413 transitions, 50679 flow. Second operand 15 states and 1961 transitions. [2023-08-30 00:49:07,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 6049 transitions, 139842 flow [2023-08-30 00:54:56,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 6049 transitions, 122535 flow, removed 8419 selfloop flow, removed 1 redundant places. [2023-08-30 00:54:56,973 INFO L231 Difference]: Finished difference. Result has 232 places, 3118 transitions, 63947 flow [2023-08-30 00:54:56,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=44945, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=63947, PETRI_PLACES=232, PETRI_TRANSITIONS=3118} [2023-08-30 00:54:56,975 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2023-08-30 00:54:56,975 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 3118 transitions, 63947 flow [2023-08-30 00:54:56,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:56,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:54:56,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:54:56,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 00:54:57,180 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,SelfDestructingSolverStorable25 [2023-08-30 00:54:57,181 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 00:54:57,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:54:57,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1468718194, now seen corresponding path program 6 times [2023-08-30 00:54:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:54:57,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700944556] [2023-08-30 00:54:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:54:57,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:54:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:54:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:54:57,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:54:57,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700944556] [2023-08-30 00:54:57,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700944556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:54:57,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428484521] [2023-08-30 00:54:57,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:54:57,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:54:57,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:54:57,321 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:54:57,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 00:54:57,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 00:54:57,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:54:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:54:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:54:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:54:57,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:54:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:54:57,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428484521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:54:57,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:54:57,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-08-30 00:54:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431100268] [2023-08-30 00:54:57,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:54:57,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:54:57,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:54:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:54:57,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:54:57,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 278 [2023-08-30 00:54:57,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 3118 transitions, 63947 flow. Second operand has 17 states, 17 states have (on average 116.23529411764706) internal successors, (1976), 17 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:57,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:54:57,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 278 [2023-08-30 00:54:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand