./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:10:37,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:10:37,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:10:37,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:10:37,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:10:37,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:10:37,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:10:37,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:10:37,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:10:37,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:10:37,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:10:37,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:10:37,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:10:37,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:10:37,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:10:37,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:10:37,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:10:37,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:10:37,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:10:37,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:10:37,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:10:37,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:10:37,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:10:37,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:10:37,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:10:37,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:10:37,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:10:37,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:10:37,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:10:37,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:10:37,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:10:37,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:10:37,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:10:37,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:10:37,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:10:37,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:10:37,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:10:37,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:10:37,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:10:37,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:10:37,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:10:37,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:10:37,240 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:10:37,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:10:37,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:10:37,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:10:37,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:10:37,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:10:37,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:10:37,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:10:37,244 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:10:37,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:10:37,245 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:10:37,245 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:10:37,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:10:37,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:10:37,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:10:37,246 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:10:37,246 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:10:37,246 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:10:37,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:10:37,246 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:10:37,247 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:10:37,247 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:10:37,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:10:37,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:10:37,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:10:37,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:10:37,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:10:37,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:10:37,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:10:37,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:10:37,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:10:37,249 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:10:37,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:10:37,249 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:10:37,250 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:10:37,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:10:37,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:10:37,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:10:37,616 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:10:37,617 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:10:37,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 07:10:38,757 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:10:39,015 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:10:39,016 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 07:10:39,028 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968c024d7/9c7d659b305f41fb80d4e5a425731d4b/FLAGd5253d789 [2023-08-30 07:10:39,043 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968c024d7/9c7d659b305f41fb80d4e5a425731d4b [2023-08-30 07:10:39,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:10:39,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:10:39,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:10:39,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:10:39,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:10:39,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@116b941f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39, skipping insertion in model container [2023-08-30 07:10:39,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:10:39,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:10:39,244 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-30 07:10:39,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:10:39,259 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:10:39,285 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-30 07:10:39,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:10:39,298 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:10:39,298 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:10:39,304 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:10:39,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39 WrapperNode [2023-08-30 07:10:39,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:10:39,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:10:39,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:10:39,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:10:39,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,355 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-08-30 07:10:39,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:10:39,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:10:39,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:10:39,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:10:39,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,392 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:10:39,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:10:39,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:10:39,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:10:39,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (1/1) ... [2023-08-30 07:10:39,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:10:39,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:39,434 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 07:10:39,467 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 07:10:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:10:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:10:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:10:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:10:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:10:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 07:10:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:10:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 07:10:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:10:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:10:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:10:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:10:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 07:10:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:10:39,489 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 07:10:39,596 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:10:39,599 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:10:39,862 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:10:39,898 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:10:39,898 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 07:10:39,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:10:39 BoogieIcfgContainer [2023-08-30 07:10:39,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:10:39,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:10:39,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:10:39,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:10:39,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:10:39" (1/3) ... [2023-08-30 07:10:39,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f68300f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:10:39, skipping insertion in model container [2023-08-30 07:10:39,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:10:39" (2/3) ... [2023-08-30 07:10:39,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f68300f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:10:39, skipping insertion in model container [2023-08-30 07:10:39,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:10:39" (3/3) ... [2023-08-30 07:10:39,907 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 07:10:39,922 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:10:39,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 07:10:39,923 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:10:39,966 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:10:39,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 93 transitions, 202 flow [2023-08-30 07:10:40,035 INFO L130 PetriNetUnfolder]: 6/91 cut-off events. [2023-08-30 07:10:40,036 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:10:40,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 91 events. 6/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-30 07:10:40,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 93 transitions, 202 flow [2023-08-30 07:10:40,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 87 transitions, 186 flow [2023-08-30 07:10:40,047 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:10:40,055 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 87 transitions, 186 flow [2023-08-30 07:10:40,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 87 transitions, 186 flow [2023-08-30 07:10:40,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 186 flow [2023-08-30 07:10:40,077 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2023-08-30 07:10:40,077 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:10:40,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-30 07:10:40,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-30 07:10:42,656 INFO L134 LiptonReduction]: Checked pairs total: 633 [2023-08-30 07:10:42,656 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-30 07:10:42,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:10:42,673 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;@3091c68c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:10:42,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 07:10:42,675 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 07:10:42,675 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:10:42,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:42,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 07:10:42,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:42,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash 370, now seen corresponding path program 1 times [2023-08-30 07:10:42,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:42,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323822784] [2023-08-30 07:10:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:42,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:42,766 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 07:10:42,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:42,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323822784] [2023-08-30 07:10:42,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323822784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:10:42,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:10:42,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 07:10:42,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365017252] [2023-08-30 07:10:42,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:10:42,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 07:10:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 07:10:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 07:10:42,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 178 [2023-08-30 07:10:42,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:42,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:42,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 178 [2023-08-30 07:10:42,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:42,865 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-30 07:10:42,865 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 07:10:42,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 521 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-30 07:10:42,870 INFO L137 encePairwiseOnDemand]: 175/178 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-30 07:10:42,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-30 07:10:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 07:10:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 07:10:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 186 transitions. [2023-08-30 07:10:42,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224719101123596 [2023-08-30 07:10:42,885 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 186 transitions. [2023-08-30 07:10:42,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 186 transitions. [2023-08-30 07:10:42,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:42,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 186 transitions. [2023-08-30 07:10:42,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:42,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:42,901 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:42,902 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 186 transitions. [2023-08-30 07:10:42,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-30 07:10:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:10:42,908 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-30 07:10:42,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-30 07:10:42,915 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 07:10:42,915 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-30 07:10:42,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:42,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:42,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:10:42,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 07:10:42,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:42,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash 362683, now seen corresponding path program 1 times [2023-08-30 07:10:42,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:42,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252876347] [2023-08-30 07:10:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:43,095 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 07:10:43,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:43,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252876347] [2023-08-30 07:10:43,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252876347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:10:43,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:10:43,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:10:43,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418141441] [2023-08-30 07:10:43,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:10:43,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:10:43,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:10:43,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:10:43,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 178 [2023-08-30 07:10:43,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:43,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 178 [2023-08-30 07:10:43,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:43,194 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-30 07:10:43,194 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:10:43,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 464 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-30 07:10:43,197 INFO L137 encePairwiseOnDemand]: 175/178 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 07:10:43,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-30 07:10:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:10:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:10:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-08-30 07:10:43,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681647940074906 [2023-08-30 07:10:43,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-08-30 07:10:43,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-08-30 07:10:43,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:43,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-08-30 07:10:43,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,209 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 250 transitions. [2023-08-30 07:10:43,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-30 07:10:43,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 07:10:43,210 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-30 07:10:43,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-30 07:10:43,211 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 07:10:43,212 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-30 07:10:43,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:43,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:10:43,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 07:10:43,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:43,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash 362682, now seen corresponding path program 1 times [2023-08-30 07:10:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:43,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673528940] [2023-08-30 07:10:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:43,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:43,318 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 07:10:43,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:43,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673528940] [2023-08-30 07:10:43,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673528940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:10:43,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:10:43,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:10:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332183910] [2023-08-30 07:10:43,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:10:43,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:10:43,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:10:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:10:43,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 178 [2023-08-30 07:10:43,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:43,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 178 [2023-08-30 07:10:43,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:43,381 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-30 07:10:43,381 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:10:43,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 421 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-30 07:10:43,383 INFO L137 encePairwiseOnDemand]: 175/178 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 07:10:43,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-30 07:10:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:10:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:10:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-08-30 07:10:43,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419475655430712 [2023-08-30 07:10:43,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-08-30 07:10:43,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-08-30 07:10:43,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:43,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-08-30 07:10:43,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,388 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 236 transitions. [2023-08-30 07:10:43,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-30 07:10:43,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:10:43,389 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-30 07:10:43,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-30 07:10:43,390 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 07:10:43,390 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-30 07:10:43,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:43,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:10:43,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 07:10:43,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:43,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash 348544549, now seen corresponding path program 1 times [2023-08-30 07:10:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:43,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050355518] [2023-08-30 07:10:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:43,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:43,485 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 07:10:43,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:43,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050355518] [2023-08-30 07:10:43,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050355518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:10:43,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:10:43,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:10:43,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863422095] [2023-08-30 07:10:43,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:10:43,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:10:43,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:10:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:10:43,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 178 [2023-08-30 07:10:43,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:43,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 178 [2023-08-30 07:10:43,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:43,581 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-30 07:10:43,582 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:10:43,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 294 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-30 07:10:43,585 INFO L137 encePairwiseOnDemand]: 176/178 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-30 07:10:43,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-30 07:10:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:10:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:10:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-30 07:10:43,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157303370786517 [2023-08-30 07:10:43,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-30 07:10:43,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-30 07:10:43,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:43,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-30 07:10:43,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,594 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 222 transitions. [2023-08-30 07:10:43,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-30 07:10:43,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:10:43,595 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-30 07:10:43,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-30 07:10:43,597 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 07:10:43,597 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-30 07:10:43,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:43,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:10:43,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 07:10:43,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:43,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash 348544550, now seen corresponding path program 1 times [2023-08-30 07:10:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:43,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185137259] [2023-08-30 07:10:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:43,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:43,752 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 07:10:43,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:43,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185137259] [2023-08-30 07:10:43,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185137259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:10:43,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:10:43,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:10:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240336055] [2023-08-30 07:10:43,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:10:43,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:10:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:43,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:10:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:10:43,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 178 [2023-08-30 07:10:43,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:43,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 178 [2023-08-30 07:10:43,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:43,836 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-30 07:10:43,837 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:10:43,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 177 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-30 07:10:43,838 INFO L137 encePairwiseOnDemand]: 176/178 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 07:10:43,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-30 07:10:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:10:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:10:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-30 07:10:43,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44756554307116103 [2023-08-30 07:10:43,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-30 07:10:43,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-30 07:10:43,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:43,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-30 07:10:43,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,843 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 239 transitions. [2023-08-30 07:10:43,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-30 07:10:43,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:10:43,844 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-30 07:10:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 07:10:43,847 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 07:10:43,847 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-30 07:10:43,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:43,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:43,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 07:10:43,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:43,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash -545852935, now seen corresponding path program 1 times [2023-08-30 07:10:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330655533] [2023-08-30 07:10:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:43,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:44,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:44,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330655533] [2023-08-30 07:10:44,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330655533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:10:44,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:10:44,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:10:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618903354] [2023-08-30 07:10:44,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:10:44,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:10:44,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:10:44,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:10:44,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 178 [2023-08-30 07:10:44,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:44,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 178 [2023-08-30 07:10:44,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:44,083 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-08-30 07:10:44,084 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:10:44,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 100 events. 59/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 263 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 207. Up to 78 conditions per place. [2023-08-30 07:10:44,086 INFO L137 encePairwiseOnDemand]: 174/178 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-30 07:10:44,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-08-30 07:10:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:10:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:10:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2023-08-30 07:10:44,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45646067415730335 [2023-08-30 07:10:44,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 325 transitions. [2023-08-30 07:10:44,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 325 transitions. [2023-08-30 07:10:44,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:44,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 325 transitions. [2023-08-30 07:10:44,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,092 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,092 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 325 transitions. [2023-08-30 07:10:44,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-08-30 07:10:44,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:10:44,094 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-08-30 07:10:44,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-30 07:10:44,097 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-08-30 07:10:44,097 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-08-30 07:10:44,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:44,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:44,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 07:10:44,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:44,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash -542162252, now seen corresponding path program 1 times [2023-08-30 07:10:44,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:44,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358231193] [2023-08-30 07:10:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:44,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:44,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:44,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358231193] [2023-08-30 07:10:44,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358231193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:44,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328344413] [2023-08-30 07:10:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:44,221 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 07:10:44,244 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 07:10:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:44,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:10:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:44,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:44,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328344413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:44,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:44,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-30 07:10:44,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884690310] [2023-08-30 07:10:44,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:44,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 07:10:44,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 07:10:44,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 07:10:44,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 178 [2023-08-30 07:10:44,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 79.14285714285714) internal successors, (554), 7 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:44,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 178 [2023-08-30 07:10:44,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:44,551 INFO L130 PetriNetUnfolder]: 73/133 cut-off events. [2023-08-30 07:10:44,551 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-08-30 07:10:44,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 133 events. 73/133 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 355 event pairs, 15 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 335. Up to 79 conditions per place. [2023-08-30 07:10:44,552 INFO L137 encePairwiseOnDemand]: 173/178 looper letters, 25 selfloop transitions, 7 changer transitions 9/42 dead transitions. [2023-08-30 07:10:44,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 201 flow [2023-08-30 07:10:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:10:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:10:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 498 transitions. [2023-08-30 07:10:44,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46629213483146065 [2023-08-30 07:10:44,555 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 498 transitions. [2023-08-30 07:10:44,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 498 transitions. [2023-08-30 07:10:44,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:44,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 498 transitions. [2023-08-30 07:10:44,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,563 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,563 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 6 states and 498 transitions. [2023-08-30 07:10:44,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 201 flow [2023-08-30 07:10:44,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 191 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 07:10:44,566 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 102 flow [2023-08-30 07:10:44,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-30 07:10:44,566 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-30 07:10:44,567 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 102 flow [2023-08-30 07:10:44,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.14285714285714) internal successors, (554), 7 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:44,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:44,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:44,576 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 07:10:44,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:44,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:44,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash -677663927, now seen corresponding path program 1 times [2023-08-30 07:10:44,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:44,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045028611] [2023-08-30 07:10:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:45,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:45,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045028611] [2023-08-30 07:10:45,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045028611] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:45,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24221588] [2023-08-30 07:10:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:45,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:45,014 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 07:10:45,036 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 07:10:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:10:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:45,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:45,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24221588] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:45,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:45,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 07:10:45,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505768147] [2023-08-30 07:10:45,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:45,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 07:10:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 07:10:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-08-30 07:10:45,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:10:45,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 102 flow. Second operand has 20 states, 20 states have (on average 71.8) internal successors, (1436), 20 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:45,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:45,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:10:45,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:46,157 INFO L130 PetriNetUnfolder]: 162/304 cut-off events. [2023-08-30 07:10:46,158 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-08-30 07:10:46,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 304 events. 162/304 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1145 event pairs, 5 based on Foata normal form. 3/307 useless extension candidates. Maximal degree in co-relation 931. Up to 101 conditions per place. [2023-08-30 07:10:46,160 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 45 selfloop transitions, 25 changer transitions 45/115 dead transitions. [2023-08-30 07:10:46,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 641 flow [2023-08-30 07:10:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 07:10:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 07:10:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1300 transitions. [2023-08-30 07:10:46,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961004626569727 [2023-08-30 07:10:46,164 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1300 transitions. [2023-08-30 07:10:46,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1300 transitions. [2023-08-30 07:10:46,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:46,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1300 transitions. [2023-08-30 07:10:46,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 76.47058823529412) internal successors, (1300), 17 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:46,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 178.0) internal successors, (3204), 18 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:46,172 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 178.0) internal successors, (3204), 18 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:46,173 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 102 flow. Second operand 17 states and 1300 transitions. [2023-08-30 07:10:46,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 641 flow [2023-08-30 07:10:46,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 115 transitions, 625 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-30 07:10:46,177 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 282 flow [2023-08-30 07:10:46,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=282, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-30 07:10:46,178 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-08-30 07:10:46,178 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 282 flow [2023-08-30 07:10:46,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 71.8) internal successors, (1436), 20 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:46,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:46,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:46,193 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 07:10:46,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-30 07:10:46,386 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:46,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:46,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1257156723, now seen corresponding path program 2 times [2023-08-30 07:10:46,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:46,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315773322] [2023-08-30 07:10:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:46,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315773322] [2023-08-30 07:10:46,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315773322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796753262] [2023-08-30 07:10:46,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:10:46,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:46,681 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 07:10:46,705 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 07:10:46,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:10:46,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:10:46,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:10:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:46,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:47,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796753262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:47,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:47,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 07:10:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728651016] [2023-08-30 07:10:47,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:47,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:10:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:10:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:10:47,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:10:47,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 282 flow. Second operand has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:47,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:47,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:10:47,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:48,564 INFO L130 PetriNetUnfolder]: 164/323 cut-off events. [2023-08-30 07:10:48,564 INFO L131 PetriNetUnfolder]: For 833/833 co-relation queries the response was YES. [2023-08-30 07:10:48,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 323 events. 164/323 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1271 event pairs, 10 based on Foata normal form. 10/333 useless extension candidates. Maximal degree in co-relation 1341. Up to 105 conditions per place. [2023-08-30 07:10:48,567 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 62 selfloop transitions, 30 changer transitions 23/115 dead transitions. [2023-08-30 07:10:48,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 115 transitions, 881 flow [2023-08-30 07:10:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 07:10:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 07:10:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1149 transitions. [2023-08-30 07:10:48,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303370786516854 [2023-08-30 07:10:48,572 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1149 transitions. [2023-08-30 07:10:48,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1149 transitions. [2023-08-30 07:10:48,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:48,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1149 transitions. [2023-08-30 07:10:48,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 76.6) internal successors, (1149), 15 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:48,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:48,589 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:48,589 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 282 flow. Second operand 15 states and 1149 transitions. [2023-08-30 07:10:48,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 115 transitions, 881 flow [2023-08-30 07:10:48,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 803 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-08-30 07:10:48,597 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 449 flow [2023-08-30 07:10:48,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=449, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-08-30 07:10:48,598 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-08-30 07:10:48,598 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 449 flow [2023-08-30 07:10:48,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:48,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:48,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:48,608 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 07:10:48,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:48,806 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:48,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash 524184273, now seen corresponding path program 3 times [2023-08-30 07:10:48,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:48,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359803994] [2023-08-30 07:10:48,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:48,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:48,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:48,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359803994] [2023-08-30 07:10:48,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359803994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:48,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188460830] [2023-08-30 07:10:48,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:10:48,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:48,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:48,985 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 07:10:48,987 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 07:10:49,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:10:49,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:10:49,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:10:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:49,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:49,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188460830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:49,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:49,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 07:10:49,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073865698] [2023-08-30 07:10:49,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:49,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:10:49,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:49,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:10:49,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:10:50,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:10:50,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 449 flow. Second operand has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:50,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:50,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:10:50,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:50,575 INFO L130 PetriNetUnfolder]: 160/318 cut-off events. [2023-08-30 07:10:50,575 INFO L131 PetriNetUnfolder]: For 1110/1110 co-relation queries the response was YES. [2023-08-30 07:10:50,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 318 events. 160/318 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1222 event pairs, 8 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1489. Up to 119 conditions per place. [2023-08-30 07:10:50,578 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 57 selfloop transitions, 34 changer transitions 28/119 dead transitions. [2023-08-30 07:10:50,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 1028 flow [2023-08-30 07:10:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:10:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:10:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1214 transitions. [2023-08-30 07:10:50,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262640449438202 [2023-08-30 07:10:50,583 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1214 transitions. [2023-08-30 07:10:50,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1214 transitions. [2023-08-30 07:10:50,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:50,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1214 transitions. [2023-08-30 07:10:50,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:50,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 178.0) internal successors, (3026), 17 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:50,591 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 178.0) internal successors, (3026), 17 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:50,591 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 449 flow. Second operand 16 states and 1214 transitions. [2023-08-30 07:10:50,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 1028 flow [2023-08-30 07:10:50,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 119 transitions, 949 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-08-30 07:10:50,599 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 546 flow [2023-08-30 07:10:50,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=546, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2023-08-30 07:10:50,600 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2023-08-30 07:10:50,600 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 546 flow [2023-08-30 07:10:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:50,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:50,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:50,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:10:50,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:50,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:50,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash 40888079, now seen corresponding path program 4 times [2023-08-30 07:10:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:50,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670886793] [2023-08-30 07:10:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:50,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:51,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:51,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670886793] [2023-08-30 07:10:51,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670886793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:51,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548504214] [2023-08-30 07:10:51,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:10:51,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:51,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:51,009 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 07:10:51,015 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 07:10:51,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:10:51,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:10:51,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:10:51,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:51,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:51,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548504214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:51,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 07:10:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706224330] [2023-08-30 07:10:51,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:51,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 07:10:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 07:10:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-30 07:10:51,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:10:51,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 546 flow. Second operand has 21 states, 21 states have (on average 71.80952380952381) internal successors, (1508), 21 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:51,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:51,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:10:51,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:52,177 INFO L130 PetriNetUnfolder]: 206/393 cut-off events. [2023-08-30 07:10:52,178 INFO L131 PetriNetUnfolder]: For 1623/1623 co-relation queries the response was YES. [2023-08-30 07:10:52,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 393 events. 206/393 cut-off events. For 1623/1623 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1579 event pairs, 21 based on Foata normal form. 1/394 useless extension candidates. Maximal degree in co-relation 1977. Up to 249 conditions per place. [2023-08-30 07:10:52,182 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 69 selfloop transitions, 22 changer transitions 27/118 dead transitions. [2023-08-30 07:10:52,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1138 flow [2023-08-30 07:10:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 07:10:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 07:10:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1131 transitions. [2023-08-30 07:10:52,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42359550561797754 [2023-08-30 07:10:52,186 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1131 transitions. [2023-08-30 07:10:52,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1131 transitions. [2023-08-30 07:10:52,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:52,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1131 transitions. [2023-08-30 07:10:52,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 75.4) internal successors, (1131), 15 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:52,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:52,194 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:52,194 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 546 flow. Second operand 15 states and 1131 transitions. [2023-08-30 07:10:52,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1138 flow [2023-08-30 07:10:52,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 1051 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 07:10:52,203 INFO L231 Difference]: Finished difference. Result has 94 places, 69 transitions, 674 flow [2023-08-30 07:10:52,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=674, PETRI_PLACES=94, PETRI_TRANSITIONS=69} [2023-08-30 07:10:52,204 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2023-08-30 07:10:52,204 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 69 transitions, 674 flow [2023-08-30 07:10:52,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 71.80952380952381) internal successors, (1508), 21 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:52,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:52,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:52,216 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 07:10:52,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 07:10:52,411 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:52,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash 34449325, now seen corresponding path program 5 times [2023-08-30 07:10:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:52,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041945518] [2023-08-30 07:10:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:52,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:52,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041945518] [2023-08-30 07:10:52,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041945518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266945317] [2023-08-30 07:10:52,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:10:52,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:52,589 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 07:10:52,614 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 07:10:52,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:10:52,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:10:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:10:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:52,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:52,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266945317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:52,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:52,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 07:10:52,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610427319] [2023-08-30 07:10:52,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:52,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 07:10:52,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 07:10:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-30 07:10:53,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:10:53,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 69 transitions, 674 flow. Second operand has 19 states, 19 states have (on average 71.84210526315789) internal successors, (1365), 19 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:53,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:53,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:10:53,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:54,074 INFO L130 PetriNetUnfolder]: 267/529 cut-off events. [2023-08-30 07:10:54,075 INFO L131 PetriNetUnfolder]: For 2880/2880 co-relation queries the response was YES. [2023-08-30 07:10:54,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 529 events. 267/529 cut-off events. For 2880/2880 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2449 event pairs, 11 based on Foata normal form. 5/534 useless extension candidates. Maximal degree in co-relation 2669. Up to 176 conditions per place. [2023-08-30 07:10:54,079 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 107 selfloop transitions, 56 changer transitions 20/183 dead transitions. [2023-08-30 07:10:54,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 183 transitions, 1679 flow [2023-08-30 07:10:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 07:10:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 07:10:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2115 transitions. [2023-08-30 07:10:54,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42435794542536115 [2023-08-30 07:10:54,086 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2115 transitions. [2023-08-30 07:10:54,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2115 transitions. [2023-08-30 07:10:54,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:54,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2115 transitions. [2023-08-30 07:10:54,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 75.53571428571429) internal successors, (2115), 28 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:54,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 178.0) internal successors, (5162), 29 states have internal predecessors, (5162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:54,100 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 178.0) internal successors, (5162), 29 states have internal predecessors, (5162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:54,100 INFO L175 Difference]: Start difference. First operand has 94 places, 69 transitions, 674 flow. Second operand 28 states and 2115 transitions. [2023-08-30 07:10:54,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 183 transitions, 1679 flow [2023-08-30 07:10:54,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1588 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-30 07:10:54,111 INFO L231 Difference]: Finished difference. Result has 118 places, 88 transitions, 968 flow [2023-08-30 07:10:54,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=968, PETRI_PLACES=118, PETRI_TRANSITIONS=88} [2023-08-30 07:10:54,112 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2023-08-30 07:10:54,112 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 88 transitions, 968 flow [2023-08-30 07:10:54,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 71.84210526315789) internal successors, (1365), 19 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:54,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:54,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:54,123 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 07:10:54,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:54,319 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:54,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1822229075, now seen corresponding path program 6 times [2023-08-30 07:10:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:54,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747065655] [2023-08-30 07:10:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:54,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:54,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747065655] [2023-08-30 07:10:54,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747065655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:54,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756432087] [2023-08-30 07:10:54,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:10:54,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:54,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:54,529 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 07:10:54,538 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 07:10:54,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:10:54,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:10:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:10:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:54,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:55,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756432087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:55,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:55,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 07:10:55,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662356504] [2023-08-30 07:10:55,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:55,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:10:55,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:55,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:10:55,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:10:55,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:10:55,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 88 transitions, 968 flow. Second operand has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:55,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:55,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:10:55,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:55,878 INFO L130 PetriNetUnfolder]: 259/506 cut-off events. [2023-08-30 07:10:55,878 INFO L131 PetriNetUnfolder]: For 3884/3884 co-relation queries the response was YES. [2023-08-30 07:10:55,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2978 conditions, 506 events. 259/506 cut-off events. For 3884/3884 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2252 event pairs, 18 based on Foata normal form. 1/507 useless extension candidates. Maximal degree in co-relation 2935. Up to 423 conditions per place. [2023-08-30 07:10:55,884 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 90 selfloop transitions, 26 changer transitions 8/124 dead transitions. [2023-08-30 07:10:55,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 124 transitions, 1450 flow [2023-08-30 07:10:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:10:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:10:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 898 transitions. [2023-08-30 07:10:55,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204119850187266 [2023-08-30 07:10:55,887 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 898 transitions. [2023-08-30 07:10:55,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 898 transitions. [2023-08-30 07:10:55,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:55,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 898 transitions. [2023-08-30 07:10:55,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 74.83333333333333) internal successors, (898), 12 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:55,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:55,892 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:55,892 INFO L175 Difference]: Start difference. First operand has 118 places, 88 transitions, 968 flow. Second operand 12 states and 898 transitions. [2023-08-30 07:10:55,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 124 transitions, 1450 flow [2023-08-30 07:10:55,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 1209 flow, removed 82 selfloop flow, removed 19 redundant places. [2023-08-30 07:10:55,908 INFO L231 Difference]: Finished difference. Result has 110 places, 95 transitions, 898 flow [2023-08-30 07:10:55,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=898, PETRI_PLACES=110, PETRI_TRANSITIONS=95} [2023-08-30 07:10:55,909 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2023-08-30 07:10:55,910 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 95 transitions, 898 flow [2023-08-30 07:10:55,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:55,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:55,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:55,923 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 07:10:56,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:56,118 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:56,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:56,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1023171265, now seen corresponding path program 7 times [2023-08-30 07:10:56,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:56,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996659633] [2023-08-30 07:10:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:56,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:56,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996659633] [2023-08-30 07:10:56,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996659633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190466384] [2023-08-30 07:10:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:10:56,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:56,389 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 07:10:56,415 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 07:10:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:10:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:56,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:56,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190466384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:56,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-08-30 07:10:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274681053] [2023-08-30 07:10:56,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:56,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 07:10:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 07:10:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-08-30 07:10:57,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 178 [2023-08-30 07:10:57,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 95 transitions, 898 flow. Second operand has 20 states, 20 states have (on average 64.9) internal successors, (1298), 20 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:57,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:57,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 178 [2023-08-30 07:10:57,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:58,410 INFO L130 PetriNetUnfolder]: 337/664 cut-off events. [2023-08-30 07:10:58,411 INFO L131 PetriNetUnfolder]: For 5069/5069 co-relation queries the response was YES. [2023-08-30 07:10:58,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3786 conditions, 664 events. 337/664 cut-off events. For 5069/5069 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3225 event pairs, 22 based on Foata normal form. 5/669 useless extension candidates. Maximal degree in co-relation 3747. Up to 349 conditions per place. [2023-08-30 07:10:58,417 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 118 selfloop transitions, 35 changer transitions 72/225 dead transitions. [2023-08-30 07:10:58,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 225 transitions, 2319 flow [2023-08-30 07:10:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 07:10:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 07:10:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2436 transitions. [2023-08-30 07:10:58,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3801498127340824 [2023-08-30 07:10:58,422 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2436 transitions. [2023-08-30 07:10:58,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2436 transitions. [2023-08-30 07:10:58,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:58,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2436 transitions. [2023-08-30 07:10:58,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.66666666666667) internal successors, (2436), 36 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:58,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:58,450 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:58,451 INFO L175 Difference]: Start difference. First operand has 110 places, 95 transitions, 898 flow. Second operand 36 states and 2436 transitions. [2023-08-30 07:10:58,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 225 transitions, 2319 flow [2023-08-30 07:10:58,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 225 transitions, 2211 flow, removed 34 selfloop flow, removed 9 redundant places. [2023-08-30 07:10:58,475 INFO L231 Difference]: Finished difference. Result has 154 places, 104 transitions, 1076 flow [2023-08-30 07:10:58,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1076, PETRI_PLACES=154, PETRI_TRANSITIONS=104} [2023-08-30 07:10:58,477 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2023-08-30 07:10:58,477 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 104 transitions, 1076 flow [2023-08-30 07:10:58,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.9) internal successors, (1298), 20 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:58,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:58,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:10:58,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:10:58,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 07:10:58,685 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:10:58,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:10:58,685 INFO L85 PathProgramCache]: Analyzing trace with hash 751769471, now seen corresponding path program 8 times [2023-08-30 07:10:58,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:10:58,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941549136] [2023-08-30 07:10:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:10:58,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:10:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:10:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:58,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:10:58,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941549136] [2023-08-30 07:10:58,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941549136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:10:58,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651530539] [2023-08-30 07:10:58,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:10:58,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:10:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:10:58,845 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 07:10:58,847 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 07:10:58,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:10:58,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:10:58,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:10:58,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:10:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:59,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:10:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:10:59,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651530539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:10:59,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:10:59,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 07:10:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442024172] [2023-08-30 07:10:59,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:10:59,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:10:59,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:10:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:10:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:10:59,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:10:59,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 104 transitions, 1076 flow. Second operand has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:59,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:10:59,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:10:59,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:10:59,952 INFO L130 PetriNetUnfolder]: 277/541 cut-off events. [2023-08-30 07:10:59,953 INFO L131 PetriNetUnfolder]: For 8538/8538 co-relation queries the response was YES. [2023-08-30 07:10:59,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3693 conditions, 541 events. 277/541 cut-off events. For 8538/8538 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2446 event pairs, 27 based on Foata normal form. 1/542 useless extension candidates. Maximal degree in co-relation 3636. Up to 437 conditions per place. [2023-08-30 07:10:59,958 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 103 selfloop transitions, 29 changer transitions 5/137 dead transitions. [2023-08-30 07:10:59,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 137 transitions, 1614 flow [2023-08-30 07:10:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:10:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:10:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 898 transitions. [2023-08-30 07:10:59,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204119850187266 [2023-08-30 07:10:59,961 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 898 transitions. [2023-08-30 07:10:59,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 898 transitions. [2023-08-30 07:10:59,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:10:59,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 898 transitions. [2023-08-30 07:10:59,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 74.83333333333333) internal successors, (898), 12 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:59,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:59,966 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:59,966 INFO L175 Difference]: Start difference. First operand has 154 places, 104 transitions, 1076 flow. Second operand 12 states and 898 transitions. [2023-08-30 07:10:59,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 137 transitions, 1614 flow [2023-08-30 07:10:59,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1309 flow, removed 101 selfloop flow, removed 28 redundant places. [2023-08-30 07:10:59,991 INFO L231 Difference]: Finished difference. Result has 126 places, 110 transitions, 978 flow [2023-08-30 07:10:59,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=978, PETRI_PLACES=126, PETRI_TRANSITIONS=110} [2023-08-30 07:10:59,992 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2023-08-30 07:10:59,992 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 110 transitions, 978 flow [2023-08-30 07:10:59,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:10:59,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:10:59,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:00,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:00,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 07:11:00,198 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:00,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:00,199 INFO L85 PathProgramCache]: Analyzing trace with hash 669402161, now seen corresponding path program 9 times [2023-08-30 07:11:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:00,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740782254] [2023-08-30 07:11:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:00,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740782254] [2023-08-30 07:11:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740782254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794046127] [2023-08-30 07:11:00,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:11:00,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:00,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:00,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:00,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 07:11:00,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:11:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:11:00,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:00,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:01,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794046127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:01,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:01,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 07:11:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43659679] [2023-08-30 07:11:01,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:01,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:11:01,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:01,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:11:01,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:11:01,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:01,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 110 transitions, 978 flow. Second operand has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:01,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:01,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:01,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:01,658 INFO L130 PetriNetUnfolder]: 279/539 cut-off events. [2023-08-30 07:11:01,659 INFO L131 PetriNetUnfolder]: For 6132/6132 co-relation queries the response was YES. [2023-08-30 07:11:01,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 539 events. 279/539 cut-off events. For 6132/6132 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2394 event pairs, 27 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 3237. Up to 429 conditions per place. [2023-08-30 07:11:01,665 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 98 selfloop transitions, 34 changer transitions 12/144 dead transitions. [2023-08-30 07:11:01,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 144 transitions, 1507 flow [2023-08-30 07:11:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 07:11:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 07:11:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1047 transitions. [2023-08-30 07:11:01,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42014446227929375 [2023-08-30 07:11:01,668 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1047 transitions. [2023-08-30 07:11:01,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1047 transitions. [2023-08-30 07:11:01,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:01,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1047 transitions. [2023-08-30 07:11:01,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 74.78571428571429) internal successors, (1047), 14 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:01,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 178.0) internal successors, (2670), 15 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:01,673 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 178.0) internal successors, (2670), 15 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:01,673 INFO L175 Difference]: Start difference. First operand has 126 places, 110 transitions, 978 flow. Second operand 14 states and 1047 transitions. [2023-08-30 07:11:01,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 144 transitions, 1507 flow [2023-08-30 07:11:01,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 144 transitions, 1435 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-30 07:11:01,690 INFO L231 Difference]: Finished difference. Result has 132 places, 111 transitions, 1003 flow [2023-08-30 07:11:01,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1003, PETRI_PLACES=132, PETRI_TRANSITIONS=111} [2023-08-30 07:11:01,691 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 103 predicate places. [2023-08-30 07:11:01,691 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 111 transitions, 1003 flow [2023-08-30 07:11:01,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:01,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:01,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:01,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:01,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 07:11:01,898 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:01,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:01,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1321223506, now seen corresponding path program 10 times [2023-08-30 07:11:01,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:01,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108868084] [2023-08-30 07:11:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:01,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:02,082 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 07:11:02,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:02,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108868084] [2023-08-30 07:11:02,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108868084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:02,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925121127] [2023-08-30 07:11:02,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:11:02,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:02,084 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:02,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 07:11:02,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:11:02,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:02,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:11:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:02,291 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 07:11:02,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:02,504 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 07:11:02,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925121127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:02,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:02,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 07:11:02,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620328395] [2023-08-30 07:11:02,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:02,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 07:11:02,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 07:11:02,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-30 07:11:02,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:02,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 111 transitions, 1003 flow. Second operand has 23 states, 23 states have (on average 71.69565217391305) internal successors, (1649), 23 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:02,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:02,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:02,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:03,246 INFO L130 PetriNetUnfolder]: 333/645 cut-off events. [2023-08-30 07:11:03,246 INFO L131 PetriNetUnfolder]: For 7831/7831 co-relation queries the response was YES. [2023-08-30 07:11:03,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4105 conditions, 645 events. 333/645 cut-off events. For 7831/7831 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3074 event pairs, 21 based on Foata normal form. 3/646 useless extension candidates. Maximal degree in co-relation 4060. Up to 318 conditions per place. [2023-08-30 07:11:03,252 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 84 selfloop transitions, 70 changer transitions 42/196 dead transitions. [2023-08-30 07:11:03,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 196 transitions, 2129 flow [2023-08-30 07:11:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 07:11:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 07:11:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1734 transitions. [2023-08-30 07:11:03,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4235466536394724 [2023-08-30 07:11:03,258 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1734 transitions. [2023-08-30 07:11:03,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1734 transitions. [2023-08-30 07:11:03,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:03,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1734 transitions. [2023-08-30 07:11:03,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 75.3913043478261) internal successors, (1734), 23 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 178.0) internal successors, (4272), 24 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,265 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 178.0) internal successors, (4272), 24 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,265 INFO L175 Difference]: Start difference. First operand has 132 places, 111 transitions, 1003 flow. Second operand 23 states and 1734 transitions. [2023-08-30 07:11:03,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 196 transitions, 2129 flow [2023-08-30 07:11:03,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 196 transitions, 1937 flow, removed 56 selfloop flow, removed 15 redundant places. [2023-08-30 07:11:03,286 INFO L231 Difference]: Finished difference. Result has 149 places, 118 transitions, 1169 flow [2023-08-30 07:11:03,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1169, PETRI_PLACES=149, PETRI_TRANSITIONS=118} [2023-08-30 07:11:03,287 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2023-08-30 07:11:03,287 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 118 transitions, 1169 flow [2023-08-30 07:11:03,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 71.69565217391305) internal successors, (1649), 23 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:03,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:03,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:03,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:03,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 07:11:03,497 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:03,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1198803054, now seen corresponding path program 11 times [2023-08-30 07:11:03,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:03,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778443259] [2023-08-30 07:11:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:03,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:03,701 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 07:11:03,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:03,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778443259] [2023-08-30 07:11:03,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778443259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983057052] [2023-08-30 07:11:03,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:11:03,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:03,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:03,703 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:03,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 07:11:03,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:11:03,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:11:03,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:03,897 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 07:11:03,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:04,113 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 07:11:04,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983057052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:04,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:04,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 07:11:04,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175046531] [2023-08-30 07:11:04,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 07:11:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 07:11:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-30 07:11:04,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:04,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 118 transitions, 1169 flow. Second operand has 23 states, 23 states have (on average 71.65217391304348) internal successors, (1648), 23 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:04,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:04,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:04,973 INFO L130 PetriNetUnfolder]: 330/662 cut-off events. [2023-08-30 07:11:04,974 INFO L131 PetriNetUnfolder]: For 12675/12675 co-relation queries the response was YES. [2023-08-30 07:11:04,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4584 conditions, 662 events. 330/662 cut-off events. For 12675/12675 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3268 event pairs, 19 based on Foata normal form. 3/663 useless extension candidates. Maximal degree in co-relation 4532. Up to 330 conditions per place. [2023-08-30 07:11:04,979 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 110 selfloop transitions, 87 changer transitions 16/213 dead transitions. [2023-08-30 07:11:04,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 213 transitions, 2386 flow [2023-08-30 07:11:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 07:11:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 07:11:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2029 transitions. [2023-08-30 07:11:04,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422180607573866 [2023-08-30 07:11:04,982 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2029 transitions. [2023-08-30 07:11:04,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2029 transitions. [2023-08-30 07:11:04,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:04,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2029 transitions. [2023-08-30 07:11:04,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 75.14814814814815) internal successors, (2029), 27 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 178.0) internal successors, (4984), 28 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,992 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 178.0) internal successors, (4984), 28 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:04,992 INFO L175 Difference]: Start difference. First operand has 149 places, 118 transitions, 1169 flow. Second operand 27 states and 2029 transitions. [2023-08-30 07:11:04,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 213 transitions, 2386 flow [2023-08-30 07:11:05,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 213 transitions, 1995 flow, removed 131 selfloop flow, removed 17 redundant places. [2023-08-30 07:11:05,015 INFO L231 Difference]: Finished difference. Result has 157 places, 137 transitions, 1421 flow [2023-08-30 07:11:05,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1421, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2023-08-30 07:11:05,016 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2023-08-30 07:11:05,016 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 1421 flow [2023-08-30 07:11:05,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 71.65217391304348) internal successors, (1648), 23 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:05,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:05,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:05,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:05,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 07:11:05,223 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:05,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:05,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1281170364, now seen corresponding path program 12 times [2023-08-30 07:11:05,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:05,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201812799] [2023-08-30 07:11:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:05,401 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 07:11:05,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201812799] [2023-08-30 07:11:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201812799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739458433] [2023-08-30 07:11:05,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:11:05,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:05,405 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:05,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 07:11:05,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 07:11:05,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:11:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:05,660 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 07:11:05,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:06,058 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 07:11:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739458433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:06,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:06,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 07:11:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22129437] [2023-08-30 07:11:06,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:06,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 07:11:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 07:11:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-08-30 07:11:06,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:06,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 1421 flow. Second operand has 25 states, 25 states have (on average 71.84) internal successors, (1796), 25 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:06,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:06,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:06,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:08,678 INFO L130 PetriNetUnfolder]: 508/988 cut-off events. [2023-08-30 07:11:08,679 INFO L131 PetriNetUnfolder]: For 16539/16539 co-relation queries the response was YES. [2023-08-30 07:11:08,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6827 conditions, 988 events. 508/988 cut-off events. For 16539/16539 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5279 event pairs, 14 based on Foata normal form. 3/989 useless extension candidates. Maximal degree in co-relation 6777. Up to 284 conditions per place. [2023-08-30 07:11:08,689 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 126 selfloop transitions, 149 changer transitions 30/305 dead transitions. [2023-08-30 07:11:08,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 305 transitions, 3577 flow [2023-08-30 07:11:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 07:11:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 07:11:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2853 transitions. [2023-08-30 07:11:08,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217918391484329 [2023-08-30 07:11:08,712 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2853 transitions. [2023-08-30 07:11:08,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2853 transitions. [2023-08-30 07:11:08,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:08,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2853 transitions. [2023-08-30 07:11:08,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 75.07894736842105) internal successors, (2853), 38 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:08,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 178.0) internal successors, (6942), 39 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:08,728 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 178.0) internal successors, (6942), 39 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:08,728 INFO L175 Difference]: Start difference. First operand has 157 places, 137 transitions, 1421 flow. Second operand 38 states and 2853 transitions. [2023-08-30 07:11:08,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 305 transitions, 3577 flow [2023-08-30 07:11:08,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 305 transitions, 3194 flow, removed 122 selfloop flow, removed 12 redundant places. [2023-08-30 07:11:08,768 INFO L231 Difference]: Finished difference. Result has 186 places, 198 transitions, 2411 flow [2023-08-30 07:11:08,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2411, PETRI_PLACES=186, PETRI_TRANSITIONS=198} [2023-08-30 07:11:08,769 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2023-08-30 07:11:08,769 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 198 transitions, 2411 flow [2023-08-30 07:11:08,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.84) internal successors, (1796), 25 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:08,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:08,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:08,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:08,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:08,976 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:08,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1682099248, now seen corresponding path program 13 times [2023-08-30 07:11:08,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:08,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902571933] [2023-08-30 07:11:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:08,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:09,154 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 07:11:09,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:09,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902571933] [2023-08-30 07:11:09,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902571933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:09,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445700309] [2023-08-30 07:11:09,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:11:09,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:09,157 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:09,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 07:11:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:09,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:11:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:09,347 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 07:11:09,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:09,578 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 07:11:09,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445700309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:09,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:09,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 07:11:09,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480031282] [2023-08-30 07:11:09,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:09,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 07:11:09,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:09,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 07:11:09,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-08-30 07:11:09,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:09,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 198 transitions, 2411 flow. Second operand has 23 states, 23 states have (on average 71.73913043478261) internal successors, (1650), 23 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:09,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:09,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:10,927 INFO L130 PetriNetUnfolder]: 648/1257 cut-off events. [2023-08-30 07:11:10,927 INFO L131 PetriNetUnfolder]: For 18421/18421 co-relation queries the response was YES. [2023-08-30 07:11:10,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9294 conditions, 1257 events. 648/1257 cut-off events. For 18421/18421 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7181 event pairs, 17 based on Foata normal form. 12/1267 useless extension candidates. Maximal degree in co-relation 9237. Up to 371 conditions per place. [2023-08-30 07:11:10,936 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 135 selfloop transitions, 136 changer transitions 89/360 dead transitions. [2023-08-30 07:11:10,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 360 transitions, 4803 flow [2023-08-30 07:11:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 07:11:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 07:11:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3069 transitions. [2023-08-30 07:11:10,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42052617155385036 [2023-08-30 07:11:10,941 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3069 transitions. [2023-08-30 07:11:10,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3069 transitions. [2023-08-30 07:11:10,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:10,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3069 transitions. [2023-08-30 07:11:10,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 74.85365853658537) internal successors, (3069), 41 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:10,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 178.0) internal successors, (7476), 42 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:10,952 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 178.0) internal successors, (7476), 42 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:10,953 INFO L175 Difference]: Start difference. First operand has 186 places, 198 transitions, 2411 flow. Second operand 41 states and 3069 transitions. [2023-08-30 07:11:10,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 360 transitions, 4803 flow [2023-08-30 07:11:11,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 360 transitions, 3897 flow, removed 325 selfloop flow, removed 25 redundant places. [2023-08-30 07:11:11,020 INFO L231 Difference]: Finished difference. Result has 209 places, 196 transitions, 2090 flow [2023-08-30 07:11:11,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2090, PETRI_PLACES=209, PETRI_TRANSITIONS=196} [2023-08-30 07:11:11,021 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 180 predicate places. [2023-08-30 07:11:11,021 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 196 transitions, 2090 flow [2023-08-30 07:11:11,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 71.73913043478261) internal successors, (1650), 23 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:11,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:11,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:11,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:11,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:11,228 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:11,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:11,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1957327264, now seen corresponding path program 14 times [2023-08-30 07:11:11,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:11,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821166907] [2023-08-30 07:11:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:11,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:11,400 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 07:11:11,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:11,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821166907] [2023-08-30 07:11:11,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821166907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:11,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436211039] [2023-08-30 07:11:11,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:11:11,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:11,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:11,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:11,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 07:11:11,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:11:11,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:11:11,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:11,661 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 07:11:11,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:12,150 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 07:11:12,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436211039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:12,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:12,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 07:11:12,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898536559] [2023-08-30 07:11:12,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:12,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 07:11:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 07:11:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-30 07:11:12,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:12,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 196 transitions, 2090 flow. Second operand has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:12,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:12,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:12,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:14,937 INFO L130 PetriNetUnfolder]: 608/1327 cut-off events. [2023-08-30 07:11:14,938 INFO L131 PetriNetUnfolder]: For 24755/24755 co-relation queries the response was YES. [2023-08-30 07:11:14,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9121 conditions, 1327 events. 608/1327 cut-off events. For 24755/24755 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8540 event pairs, 14 based on Foata normal form. 12/1337 useless extension candidates. Maximal degree in co-relation 9061. Up to 311 conditions per place. [2023-08-30 07:11:14,950 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 167 selfloop transitions, 198 changer transitions 34/399 dead transitions. [2023-08-30 07:11:14,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 399 transitions, 4870 flow [2023-08-30 07:11:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 07:11:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 07:11:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3789 transitions. [2023-08-30 07:11:14,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173826834104428 [2023-08-30 07:11:14,956 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3789 transitions. [2023-08-30 07:11:14,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3789 transitions. [2023-08-30 07:11:14,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:14,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3789 transitions. [2023-08-30 07:11:14,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 74.29411764705883) internal successors, (3789), 51 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:14,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 178.0) internal successors, (9256), 52 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:14,969 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 178.0) internal successors, (9256), 52 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:14,969 INFO L175 Difference]: Start difference. First operand has 209 places, 196 transitions, 2090 flow. Second operand 51 states and 3789 transitions. [2023-08-30 07:11:14,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 399 transitions, 4870 flow [2023-08-30 07:11:15,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 399 transitions, 4089 flow, removed 269 selfloop flow, removed 32 redundant places. [2023-08-30 07:11:15,033 INFO L231 Difference]: Finished difference. Result has 226 places, 263 transitions, 3135 flow [2023-08-30 07:11:15,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3135, PETRI_PLACES=226, PETRI_TRANSITIONS=263} [2023-08-30 07:11:15,034 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 197 predicate places. [2023-08-30 07:11:15,034 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 263 transitions, 3135 flow [2023-08-30 07:11:15,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:15,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:15,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:15,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:15,241 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:15,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash -618701680, now seen corresponding path program 15 times [2023-08-30 07:11:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839978091] [2023-08-30 07:11:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:15,413 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 07:11:15,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839978091] [2023-08-30 07:11:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839978091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508442304] [2023-08-30 07:11:15,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:11:15,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:15,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:15,416 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:15,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 07:11:15,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:11:15,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:15,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:11:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:15,705 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 07:11:15,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:16,010 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 07:11:16,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508442304] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:16,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:16,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 07:11:16,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9734581] [2023-08-30 07:11:16,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:16,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 07:11:16,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 07:11:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-08-30 07:11:16,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:16,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 263 transitions, 3135 flow. Second operand has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:16,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:16,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:16,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:17,727 INFO L130 PetriNetUnfolder]: 599/1260 cut-off events. [2023-08-30 07:11:17,727 INFO L131 PetriNetUnfolder]: For 18427/18427 co-relation queries the response was YES. [2023-08-30 07:11:17,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8535 conditions, 1260 events. 599/1260 cut-off events. For 18427/18427 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7722 event pairs, 16 based on Foata normal form. 10/1268 useless extension candidates. Maximal degree in co-relation 8476. Up to 326 conditions per place. [2023-08-30 07:11:17,738 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 165 selfloop transitions, 146 changer transitions 67/378 dead transitions. [2023-08-30 07:11:17,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 378 transitions, 4732 flow [2023-08-30 07:11:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 07:11:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 07:11:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3115 transitions. [2023-08-30 07:11:17,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-30 07:11:17,743 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3115 transitions. [2023-08-30 07:11:17,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3115 transitions. [2023-08-30 07:11:17,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:17,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3115 transitions. [2023-08-30 07:11:17,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 74.16666666666667) internal successors, (3115), 42 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:17,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 178.0) internal successors, (7654), 43 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:17,753 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 178.0) internal successors, (7654), 43 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:17,753 INFO L175 Difference]: Start difference. First operand has 226 places, 263 transitions, 3135 flow. Second operand 42 states and 3115 transitions. [2023-08-30 07:11:17,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 378 transitions, 4732 flow [2023-08-30 07:11:17,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 378 transitions, 4038 flow, removed 266 selfloop flow, removed 23 redundant places. [2023-08-30 07:11:17,818 INFO L231 Difference]: Finished difference. Result has 244 places, 238 transitions, 2613 flow [2023-08-30 07:11:17,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2613, PETRI_PLACES=244, PETRI_TRANSITIONS=238} [2023-08-30 07:11:17,819 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2023-08-30 07:11:17,819 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 238 transitions, 2613 flow [2023-08-30 07:11:17,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:17,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:17,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:17,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 07:11:18,021 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:18,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1874959954, now seen corresponding path program 16 times [2023-08-30 07:11:18,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:18,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132851799] [2023-08-30 07:11:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:18,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:18,198 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 07:11:18,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132851799] [2023-08-30 07:11:18,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132851799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056760159] [2023-08-30 07:11:18,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:11:18,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:18,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:18,201 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:18,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 07:11:18,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:11:18,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:18,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:11:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:18,513 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 07:11:18,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:18,731 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 07:11:18,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056760159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:18,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:18,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 07:11:18,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642511348] [2023-08-30 07:11:18,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:18,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:11:18,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:18,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:11:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:11:18,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:18,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 238 transitions, 2613 flow. Second operand has 24 states, 24 states have (on average 71.70833333333333) internal successors, (1721), 24 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:18,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:18,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:18,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:20,133 INFO L130 PetriNetUnfolder]: 648/1363 cut-off events. [2023-08-30 07:11:20,133 INFO L131 PetriNetUnfolder]: For 19994/19994 co-relation queries the response was YES. [2023-08-30 07:11:20,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8551 conditions, 1363 events. 648/1363 cut-off events. For 19994/19994 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8461 event pairs, 27 based on Foata normal form. 10/1371 useless extension candidates. Maximal degree in co-relation 8492. Up to 501 conditions per place. [2023-08-30 07:11:20,142 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 212 selfloop transitions, 145 changer transitions 27/384 dead transitions. [2023-08-30 07:11:20,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 384 transitions, 4830 flow [2023-08-30 07:11:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 07:11:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 07:11:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2614 transitions. [2023-08-30 07:11:20,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41958266452648474 [2023-08-30 07:11:20,147 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2614 transitions. [2023-08-30 07:11:20,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2614 transitions. [2023-08-30 07:11:20,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:20,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2614 transitions. [2023-08-30 07:11:20,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.68571428571428) internal successors, (2614), 35 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:20,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:20,155 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:20,155 INFO L175 Difference]: Start difference. First operand has 244 places, 238 transitions, 2613 flow. Second operand 35 states and 2614 transitions. [2023-08-30 07:11:20,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 384 transitions, 4830 flow [2023-08-30 07:11:20,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 384 transitions, 4387 flow, removed 78 selfloop flow, removed 35 redundant places. [2023-08-30 07:11:20,218 INFO L231 Difference]: Finished difference. Result has 231 places, 268 transitions, 3187 flow [2023-08-30 07:11:20,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3187, PETRI_PLACES=231, PETRI_TRANSITIONS=268} [2023-08-30 07:11:20,218 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2023-08-30 07:11:20,219 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 268 transitions, 3187 flow [2023-08-30 07:11:20,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 71.70833333333333) internal successors, (1721), 24 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:20,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:20,219 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:20,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:20,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:20,420 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:20,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1683924946, now seen corresponding path program 17 times [2023-08-30 07:11:20,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:20,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663591839] [2023-08-30 07:11:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:20,579 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 07:11:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663591839] [2023-08-30 07:11:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663591839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717869997] [2023-08-30 07:11:20,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:11:20,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:20,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:20,581 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:20,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 07:11:20,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:11:20,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:11:20,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:20,792 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 07:11:20,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:21,035 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 07:11:21,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717869997] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:21,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:21,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 07:11:21,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022991624] [2023-08-30 07:11:21,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:21,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:11:21,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:11:21,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:11:21,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:21,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 268 transitions, 3187 flow. Second operand has 22 states, 22 states have (on average 71.68181818181819) internal successors, (1577), 22 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:21,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:21,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:21,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:22,382 INFO L130 PetriNetUnfolder]: 810/1757 cut-off events. [2023-08-30 07:11:22,382 INFO L131 PetriNetUnfolder]: For 37464/37464 co-relation queries the response was YES. [2023-08-30 07:11:22,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11933 conditions, 1757 events. 810/1757 cut-off events. For 37464/37464 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11942 event pairs, 35 based on Foata normal form. 14/1771 useless extension candidates. Maximal degree in co-relation 11871. Up to 838 conditions per place. [2023-08-30 07:11:22,395 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 270 selfloop transitions, 144 changer transitions 45/459 dead transitions. [2023-08-30 07:11:22,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 459 transitions, 6369 flow [2023-08-30 07:11:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 07:11:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 07:11:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2333 transitions. [2023-08-30 07:11:22,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42279811525915184 [2023-08-30 07:11:22,398 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2333 transitions. [2023-08-30 07:11:22,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2333 transitions. [2023-08-30 07:11:22,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:22,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2333 transitions. [2023-08-30 07:11:22,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 75.25806451612904) internal successors, (2333), 31 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:22,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 178.0) internal successors, (5696), 32 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:22,406 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 178.0) internal successors, (5696), 32 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:22,406 INFO L175 Difference]: Start difference. First operand has 231 places, 268 transitions, 3187 flow. Second operand 31 states and 2333 transitions. [2023-08-30 07:11:22,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 459 transitions, 6369 flow [2023-08-30 07:11:22,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 459 transitions, 5957 flow, removed 150 selfloop flow, removed 19 redundant places. [2023-08-30 07:11:22,527 INFO L231 Difference]: Finished difference. Result has 250 places, 318 transitions, 4130 flow [2023-08-30 07:11:22,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4130, PETRI_PLACES=250, PETRI_TRANSITIONS=318} [2023-08-30 07:11:22,528 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2023-08-30 07:11:22,529 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 318 transitions, 4130 flow [2023-08-30 07:11:22,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.68181818181819) internal successors, (1577), 22 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:22,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:22,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:22,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:22,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:22,736 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:22,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1919277674, now seen corresponding path program 18 times [2023-08-30 07:11:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654963574] [2023-08-30 07:11:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:22,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:22,993 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 07:11:22,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654963574] [2023-08-30 07:11:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654963574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684795379] [2023-08-30 07:11:22,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:11:22,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:22,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:22,995 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:23,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 07:11:23,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:11:23,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:23,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:11:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:23,319 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 07:11:23,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:23,753 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 07:11:23,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684795379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:23,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:23,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-30 07:11:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499078867] [2023-08-30 07:11:23,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:23,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 07:11:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 07:11:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-08-30 07:11:24,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 178 [2023-08-30 07:11:24,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 318 transitions, 4130 flow. Second operand has 26 states, 26 states have (on average 64.6923076923077) internal successors, (1682), 26 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:24,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:24,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 178 [2023-08-30 07:11:24,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:27,143 INFO L130 PetriNetUnfolder]: 841/1781 cut-off events. [2023-08-30 07:11:27,143 INFO L131 PetriNetUnfolder]: For 45299/45299 co-relation queries the response was YES. [2023-08-30 07:11:27,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13211 conditions, 1781 events. 841/1781 cut-off events. For 45299/45299 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11798 event pairs, 34 based on Foata normal form. 5/1786 useless extension candidates. Maximal degree in co-relation 13138. Up to 944 conditions per place. [2023-08-30 07:11:27,157 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 310 selfloop transitions, 121 changer transitions 21/452 dead transitions. [2023-08-30 07:11:27,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 452 transitions, 6392 flow [2023-08-30 07:11:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 07:11:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 07:11:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3002 transitions. [2023-08-30 07:11:27,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37478152309612983 [2023-08-30 07:11:27,161 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3002 transitions. [2023-08-30 07:11:27,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3002 transitions. [2023-08-30 07:11:27,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:27,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3002 transitions. [2023-08-30 07:11:27,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 66.71111111111111) internal successors, (3002), 45 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:27,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 178.0) internal successors, (8188), 46 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:27,171 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 178.0) internal successors, (8188), 46 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:27,171 INFO L175 Difference]: Start difference. First operand has 250 places, 318 transitions, 4130 flow. Second operand 45 states and 3002 transitions. [2023-08-30 07:11:27,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 452 transitions, 6392 flow [2023-08-30 07:11:27,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 452 transitions, 5910 flow, removed 204 selfloop flow, removed 21 redundant places. [2023-08-30 07:11:27,365 INFO L231 Difference]: Finished difference. Result has 281 places, 359 transitions, 4775 flow [2023-08-30 07:11:27,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=3800, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4775, PETRI_PLACES=281, PETRI_TRANSITIONS=359} [2023-08-30 07:11:27,366 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 252 predicate places. [2023-08-30 07:11:27,366 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 359 transitions, 4775 flow [2023-08-30 07:11:27,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 64.6923076923077) internal successors, (1682), 26 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:27,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:27,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:27,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:27,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:27,582 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:27,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:27,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1517919016, now seen corresponding path program 19 times [2023-08-30 07:11:27,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:27,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578770077] [2023-08-30 07:11:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:27,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:27,742 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 07:11:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578770077] [2023-08-30 07:11:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578770077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682914262] [2023-08-30 07:11:27,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:11:27,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:27,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:27,745 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:27,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 07:11:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:27,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:11:27,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:27,918 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 07:11:27,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:28,125 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 07:11:28,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682914262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:28,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:28,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 07:11:28,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810001942] [2023-08-30 07:11:28,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:28,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:11:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:11:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:11:28,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:28,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 359 transitions, 4775 flow. Second operand has 22 states, 22 states have (on average 71.77272727272727) internal successors, (1579), 22 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:28,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:28,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:28,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:29,639 INFO L130 PetriNetUnfolder]: 979/2082 cut-off events. [2023-08-30 07:11:29,639 INFO L131 PetriNetUnfolder]: For 55787/55787 co-relation queries the response was YES. [2023-08-30 07:11:29,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16372 conditions, 2082 events. 979/2082 cut-off events. For 55787/55787 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14404 event pairs, 58 based on Foata normal form. 11/2093 useless extension candidates. Maximal degree in co-relation 16291. Up to 1356 conditions per place. [2023-08-30 07:11:29,656 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 354 selfloop transitions, 98 changer transitions 41/493 dead transitions. [2023-08-30 07:11:29,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 493 transitions, 7613 flow [2023-08-30 07:11:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 07:11:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 07:11:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2411 transitions. [2023-08-30 07:11:29,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42327949438202245 [2023-08-30 07:11:29,664 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2411 transitions. [2023-08-30 07:11:29,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2411 transitions. [2023-08-30 07:11:29,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:29,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2411 transitions. [2023-08-30 07:11:29,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 75.34375) internal successors, (2411), 32 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:29,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 178.0) internal successors, (5874), 33 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:29,709 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 178.0) internal successors, (5874), 33 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:29,709 INFO L175 Difference]: Start difference. First operand has 281 places, 359 transitions, 4775 flow. Second operand 32 states and 2411 transitions. [2023-08-30 07:11:29,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 493 transitions, 7613 flow [2023-08-30 07:11:29,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 493 transitions, 7011 flow, removed 271 selfloop flow, removed 15 redundant places. [2023-08-30 07:11:29,914 INFO L231 Difference]: Finished difference. Result has 304 places, 373 transitions, 5159 flow [2023-08-30 07:11:29,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5159, PETRI_PLACES=304, PETRI_TRANSITIONS=373} [2023-08-30 07:11:29,916 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 275 predicate places. [2023-08-30 07:11:29,916 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 373 transitions, 5159 flow [2023-08-30 07:11:29,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.77272727272727) internal successors, (1579), 22 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:29,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:29,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:29,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:30,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 07:11:30,123 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:30,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:30,123 INFO L85 PathProgramCache]: Analyzing trace with hash 422533810, now seen corresponding path program 20 times [2023-08-30 07:11:30,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:30,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994926789] [2023-08-30 07:11:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:30,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:30,315 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 07:11:30,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994926789] [2023-08-30 07:11:30,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994926789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:30,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29821216] [2023-08-30 07:11:30,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:11:30,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:30,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:30,321 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:30,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 07:11:30,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:11:30,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:11:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:30,610 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 07:11:30,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:30,968 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 07:11:30,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29821216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:30,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:30,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 07:11:30,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486561124] [2023-08-30 07:11:30,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:30,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 07:11:30,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 07:11:30,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2023-08-30 07:11:31,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:31,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 373 transitions, 5159 flow. Second operand has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:31,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:31,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:31,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:32,934 INFO L130 PetriNetUnfolder]: 1065/2331 cut-off events. [2023-08-30 07:11:32,935 INFO L131 PetriNetUnfolder]: For 78817/78817 co-relation queries the response was YES. [2023-08-30 07:11:32,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19234 conditions, 2331 events. 1065/2331 cut-off events. For 78817/78817 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17043 event pairs, 36 based on Foata normal form. 8/2337 useless extension candidates. Maximal degree in co-relation 19142. Up to 970 conditions per place. [2023-08-30 07:11:32,952 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 335 selfloop transitions, 154 changer transitions 26/515 dead transitions. [2023-08-30 07:11:32,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 515 transitions, 8252 flow [2023-08-30 07:11:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 07:11:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 07:11:32,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2680 transitions. [2023-08-30 07:11:32,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418227215980025 [2023-08-30 07:11:32,954 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2680 transitions. [2023-08-30 07:11:32,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2680 transitions. [2023-08-30 07:11:32,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:32,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2680 transitions. [2023-08-30 07:11:32,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 74.44444444444444) internal successors, (2680), 36 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:32,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:32,961 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:32,961 INFO L175 Difference]: Start difference. First operand has 304 places, 373 transitions, 5159 flow. Second operand 36 states and 2680 transitions. [2023-08-30 07:11:32,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 515 transitions, 8252 flow [2023-08-30 07:11:33,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 515 transitions, 7509 flow, removed 336 selfloop flow, removed 20 redundant places. [2023-08-30 07:11:33,230 INFO L231 Difference]: Finished difference. Result has 313 places, 413 transitions, 6087 flow [2023-08-30 07:11:33,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6087, PETRI_PLACES=313, PETRI_TRANSITIONS=413} [2023-08-30 07:11:33,231 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2023-08-30 07:11:33,231 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 413 transitions, 6087 flow [2023-08-30 07:11:33,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:33,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:33,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:33,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:33,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 07:11:33,432 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:33,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:33,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2141472162, now seen corresponding path program 21 times [2023-08-30 07:11:33,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:33,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393456483] [2023-08-30 07:11:33,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:33,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:33,579 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 07:11:33,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393456483] [2023-08-30 07:11:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393456483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:33,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721568807] [2023-08-30 07:11:33,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:11:33,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:33,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:33,585 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:33,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 07:11:33,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:11:33,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:33,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:11:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:33,882 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 07:11:33,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:34,375 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 07:11:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721568807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:34,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:34,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 07:11:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678772018] [2023-08-30 07:11:34,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:34,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 07:11:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 07:11:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-08-30 07:11:34,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:34,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 413 transitions, 6087 flow. Second operand has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:34,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:34,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:34,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:35,897 INFO L130 PetriNetUnfolder]: 1055/2257 cut-off events. [2023-08-30 07:11:35,897 INFO L131 PetriNetUnfolder]: For 75799/75799 co-relation queries the response was YES. [2023-08-30 07:11:35,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18654 conditions, 2257 events. 1055/2257 cut-off events. For 75799/75799 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15999 event pairs, 36 based on Foata normal form. 13/2268 useless extension candidates. Maximal degree in co-relation 18561. Up to 1001 conditions per place. [2023-08-30 07:11:35,914 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 317 selfloop transitions, 112 changer transitions 60/489 dead transitions. [2023-08-30 07:11:35,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 489 transitions, 7873 flow [2023-08-30 07:11:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 07:11:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 07:11:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1930 transitions. [2023-08-30 07:11:35,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170267934312878 [2023-08-30 07:11:35,917 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1930 transitions. [2023-08-30 07:11:35,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1930 transitions. [2023-08-30 07:11:35,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:35,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1930 transitions. [2023-08-30 07:11:35,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.23076923076923) internal successors, (1930), 26 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:35,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 178.0) internal successors, (4806), 27 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:35,923 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 178.0) internal successors, (4806), 27 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:35,924 INFO L175 Difference]: Start difference. First operand has 313 places, 413 transitions, 6087 flow. Second operand 26 states and 1930 transitions. [2023-08-30 07:11:35,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 489 transitions, 7873 flow [2023-08-30 07:11:36,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 489 transitions, 7201 flow, removed 289 selfloop flow, removed 17 redundant places. [2023-08-30 07:11:36,195 INFO L231 Difference]: Finished difference. Result has 319 places, 382 transitions, 5281 flow [2023-08-30 07:11:36,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5281, PETRI_PLACES=319, PETRI_TRANSITIONS=382} [2023-08-30 07:11:36,196 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 290 predicate places. [2023-08-30 07:11:36,197 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 382 transitions, 5281 flow [2023-08-30 07:11:36,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:36,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:36,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:36,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:36,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 07:11:36,404 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:36,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash 691220539, now seen corresponding path program 22 times [2023-08-30 07:11:36,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:36,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6329508] [2023-08-30 07:11:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:36,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:36,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:36,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6329508] [2023-08-30 07:11:36,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6329508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:36,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830846064] [2023-08-30 07:11:36,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:11:36,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:36,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:36,613 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:36,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 07:11:36,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:11:36,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:36,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 07:11:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:36,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:37,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830846064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:37,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 07:11:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316455259] [2023-08-30 07:11:37,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:37,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 07:11:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 07:11:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-08-30 07:11:37,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:37,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 382 transitions, 5281 flow. Second operand has 26 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:37,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:37,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:37,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:38,181 INFO L130 PetriNetUnfolder]: 1045/2190 cut-off events. [2023-08-30 07:11:38,181 INFO L131 PetriNetUnfolder]: For 71528/71528 co-relation queries the response was YES. [2023-08-30 07:11:38,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17833 conditions, 2190 events. 1045/2190 cut-off events. For 71528/71528 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15067 event pairs, 82 based on Foata normal form. 4/2192 useless extension candidates. Maximal degree in co-relation 17740. Up to 1554 conditions per place. [2023-08-30 07:11:38,198 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 284 selfloop transitions, 163 changer transitions 22/469 dead transitions. [2023-08-30 07:11:38,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 469 transitions, 7368 flow [2023-08-30 07:11:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:11:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:11:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1803 transitions. [2023-08-30 07:11:38,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220505617977528 [2023-08-30 07:11:38,201 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1803 transitions. [2023-08-30 07:11:38,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1803 transitions. [2023-08-30 07:11:38,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:38,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1803 transitions. [2023-08-30 07:11:38,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 75.125) internal successors, (1803), 24 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:38,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 178.0) internal successors, (4450), 25 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:38,206 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 178.0) internal successors, (4450), 25 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:38,206 INFO L175 Difference]: Start difference. First operand has 319 places, 382 transitions, 5281 flow. Second operand 24 states and 1803 transitions. [2023-08-30 07:11:38,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 469 transitions, 7368 flow [2023-08-30 07:11:38,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 469 transitions, 7071 flow, removed 60 selfloop flow, removed 20 redundant places. [2023-08-30 07:11:38,467 INFO L231 Difference]: Finished difference. Result has 311 places, 394 transitions, 5707 flow [2023-08-30 07:11:38,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=5023, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5707, PETRI_PLACES=311, PETRI_TRANSITIONS=394} [2023-08-30 07:11:38,468 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2023-08-30 07:11:38,468 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 394 transitions, 5707 flow [2023-08-30 07:11:38,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:38,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:38,471 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:38,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:38,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:38,677 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:38,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -216780269, now seen corresponding path program 23 times [2023-08-30 07:11:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:38,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616993600] [2023-08-30 07:11:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:38,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:38,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616993600] [2023-08-30 07:11:38,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616993600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:38,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279609633] [2023-08-30 07:11:38,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:11:38,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:38,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:38,905 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:38,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 07:11:38,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:11:38,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 07:11:38,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:39,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:39,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279609633] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:39,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 07:11:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95443260] [2023-08-30 07:11:39,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 07:11:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 07:11:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-08-30 07:11:39,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:39,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 394 transitions, 5707 flow. Second operand has 26 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:39,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:39,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:39,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:41,305 INFO L130 PetriNetUnfolder]: 1286/2715 cut-off events. [2023-08-30 07:11:41,305 INFO L131 PetriNetUnfolder]: For 101691/101691 co-relation queries the response was YES. [2023-08-30 07:11:41,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22904 conditions, 2715 events. 1286/2715 cut-off events. For 101691/101691 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19793 event pairs, 64 based on Foata normal form. 15/2728 useless extension candidates. Maximal degree in co-relation 22808. Up to 930 conditions per place. [2023-08-30 07:11:41,328 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 316 selfloop transitions, 256 changer transitions 33/605 dead transitions. [2023-08-30 07:11:41,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 605 transitions, 10170 flow [2023-08-30 07:11:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 07:11:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 07:11:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3208 transitions. [2023-08-30 07:11:41,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41912725372354326 [2023-08-30 07:11:41,330 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3208 transitions. [2023-08-30 07:11:41,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3208 transitions. [2023-08-30 07:11:41,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:41,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3208 transitions. [2023-08-30 07:11:41,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 74.6046511627907) internal successors, (3208), 43 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:41,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 178.0) internal successors, (7832), 44 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:41,339 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 178.0) internal successors, (7832), 44 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:41,339 INFO L175 Difference]: Start difference. First operand has 311 places, 394 transitions, 5707 flow. Second operand 43 states and 3208 transitions. [2023-08-30 07:11:41,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 605 transitions, 10170 flow [2023-08-30 07:11:41,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 605 transitions, 9357 flow, removed 262 selfloop flow, removed 22 redundant places. [2023-08-30 07:11:41,646 INFO L231 Difference]: Finished difference. Result has 340 places, 444 transitions, 6992 flow [2023-08-30 07:11:41,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=6992, PETRI_PLACES=340, PETRI_TRANSITIONS=444} [2023-08-30 07:11:41,646 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 311 predicate places. [2023-08-30 07:11:41,647 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 444 transitions, 6992 flow [2023-08-30 07:11:41,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:41,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:41,647 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:41,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:41,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:41,853 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:41,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash -773123167, now seen corresponding path program 24 times [2023-08-30 07:11:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:41,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498963561] [2023-08-30 07:11:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:41,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:42,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:42,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498963561] [2023-08-30 07:11:42,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498963561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:42,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388682463] [2023-08-30 07:11:42,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:11:42,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:42,032 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:42,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 07:11:42,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:11:42,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:42,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 07:11:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:42,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388682463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:42,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:42,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-30 07:11:42,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615413085] [2023-08-30 07:11:42,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:42,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 07:11:42,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:42,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 07:11:42,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-08-30 07:11:42,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:42,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 444 transitions, 6992 flow. Second operand has 28 states, 28 states have (on average 71.67857142857143) internal successors, (2007), 28 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:42,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:42,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:42,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:45,050 INFO L130 PetriNetUnfolder]: 1392/2944 cut-off events. [2023-08-30 07:11:45,050 INFO L131 PetriNetUnfolder]: For 112394/112394 co-relation queries the response was YES. [2023-08-30 07:11:45,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25462 conditions, 2944 events. 1392/2944 cut-off events. For 112394/112394 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21784 event pairs, 24 based on Foata normal form. 12/2954 useless extension candidates. Maximal degree in co-relation 25358. Up to 1350 conditions per place. [2023-08-30 07:11:45,079 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 389 selfloop transitions, 159 changer transitions 26/574 dead transitions. [2023-08-30 07:11:45,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 574 transitions, 9847 flow [2023-08-30 07:11:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 07:11:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 07:11:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2609 transitions. [2023-08-30 07:11:45,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187800963081862 [2023-08-30 07:11:45,081 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2609 transitions. [2023-08-30 07:11:45,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2609 transitions. [2023-08-30 07:11:45,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:45,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2609 transitions. [2023-08-30 07:11:45,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.54285714285714) internal successors, (2609), 35 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:45,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:45,086 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:45,086 INFO L175 Difference]: Start difference. First operand has 340 places, 444 transitions, 6992 flow. Second operand 35 states and 2609 transitions. [2023-08-30 07:11:45,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 574 transitions, 9847 flow [2023-08-30 07:11:45,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 574 transitions, 9149 flow, removed 265 selfloop flow, removed 30 redundant places. [2023-08-30 07:11:45,474 INFO L231 Difference]: Finished difference. Result has 347 places, 466 transitions, 7402 flow [2023-08-30 07:11:45,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7402, PETRI_PLACES=347, PETRI_TRANSITIONS=466} [2023-08-30 07:11:45,475 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 318 predicate places. [2023-08-30 07:11:45,475 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 466 transitions, 7402 flow [2023-08-30 07:11:45,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.67857142857143) internal successors, (2007), 28 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:45,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:45,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:45,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:45,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 07:11:45,679 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:45,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:45,680 INFO L85 PathProgramCache]: Analyzing trace with hash -559238599, now seen corresponding path program 25 times [2023-08-30 07:11:45,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:45,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312309524] [2023-08-30 07:11:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:45,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:45,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312309524] [2023-08-30 07:11:45,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312309524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:45,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179903062] [2023-08-30 07:11:45,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:11:45,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:45,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:45,887 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:45,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 07:11:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:45,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 07:11:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:46,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:46,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179903062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:46,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:46,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-30 07:11:46,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893409103] [2023-08-30 07:11:46,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:11:46,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:11:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:11:46,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:46,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 466 transitions, 7402 flow. Second operand has 24 states, 24 states have (on average 71.66666666666667) internal successors, (1720), 24 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:46,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:46,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:46,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:47,661 INFO L130 PetriNetUnfolder]: 1409/3003 cut-off events. [2023-08-30 07:11:47,661 INFO L131 PetriNetUnfolder]: For 112303/112303 co-relation queries the response was YES. [2023-08-30 07:11:47,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25689 conditions, 3003 events. 1409/3003 cut-off events. For 112303/112303 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22441 event pairs, 94 based on Foata normal form. 14/3015 useless extension candidates. Maximal degree in co-relation 25582. Up to 2121 conditions per place. [2023-08-30 07:11:47,686 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 417 selfloop transitions, 111 changer transitions 31/559 dead transitions. [2023-08-30 07:11:47,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 559 transitions, 9894 flow [2023-08-30 07:11:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 07:11:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 07:11:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1501 transitions. [2023-08-30 07:11:47,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216292134831461 [2023-08-30 07:11:47,690 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1501 transitions. [2023-08-30 07:11:47,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1501 transitions. [2023-08-30 07:11:47,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:47,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1501 transitions. [2023-08-30 07:11:47,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.05) internal successors, (1501), 20 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:47,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 178.0) internal successors, (3738), 21 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:47,695 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 178.0) internal successors, (3738), 21 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:47,695 INFO L175 Difference]: Start difference. First operand has 347 places, 466 transitions, 7402 flow. Second operand 20 states and 1501 transitions. [2023-08-30 07:11:47,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 559 transitions, 9894 flow [2023-08-30 07:11:48,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 559 transitions, 9670 flow, removed 73 selfloop flow, removed 20 redundant places. [2023-08-30 07:11:48,074 INFO L231 Difference]: Finished difference. Result has 346 places, 486 transitions, 7967 flow [2023-08-30 07:11:48,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=7200, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7967, PETRI_PLACES=346, PETRI_TRANSITIONS=486} [2023-08-30 07:11:48,075 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 317 predicate places. [2023-08-30 07:11:48,075 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 486 transitions, 7967 flow [2023-08-30 07:11:48,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 71.66666666666667) internal successors, (1720), 24 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:48,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:48,076 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:48,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:48,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 07:11:48,285 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:48,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:48,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1276204399, now seen corresponding path program 26 times [2023-08-30 07:11:48,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:48,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97768835] [2023-08-30 07:11:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:48,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:11:48,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97768835] [2023-08-30 07:11:48,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97768835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:48,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681082338] [2023-08-30 07:11:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:11:48,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:48,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:48,438 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:48,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 07:11:48,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:11:48,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 07:11:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:48,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681082338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:49,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:49,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-08-30 07:11:49,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22678775] [2023-08-30 07:11:49,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:49,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 07:11:49,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 07:11:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-08-30 07:11:49,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:49,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 486 transitions, 7967 flow. Second operand has 27 states, 27 states have (on average 71.81481481481481) internal successors, (1939), 27 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:49,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:49,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:49,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:51,043 INFO L130 PetriNetUnfolder]: 1449/3039 cut-off events. [2023-08-30 07:11:51,044 INFO L131 PetriNetUnfolder]: For 120174/120174 co-relation queries the response was YES. [2023-08-30 07:11:51,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27017 conditions, 3039 events. 1449/3039 cut-off events. For 120174/120174 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22383 event pairs, 30 based on Foata normal form. 7/3046 useless extension candidates. Maximal degree in co-relation 26907. Up to 1504 conditions per place. [2023-08-30 07:11:51,067 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 397 selfloop transitions, 152 changer transitions 23/572 dead transitions. [2023-08-30 07:11:51,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 572 transitions, 10119 flow [2023-08-30 07:11:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 07:11:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 07:11:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2234 transitions. [2023-08-30 07:11:51,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183520599250936 [2023-08-30 07:11:51,070 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2234 transitions. [2023-08-30 07:11:51,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2234 transitions. [2023-08-30 07:11:51,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:51,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2234 transitions. [2023-08-30 07:11:51,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 74.46666666666667) internal successors, (2234), 30 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:51,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 178.0) internal successors, (5518), 31 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:51,075 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 178.0) internal successors, (5518), 31 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:51,075 INFO L175 Difference]: Start difference. First operand has 346 places, 486 transitions, 7967 flow. Second operand 30 states and 2234 transitions. [2023-08-30 07:11:51,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 572 transitions, 10119 flow [2023-08-30 07:11:51,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 572 transitions, 9580 flow, removed 166 selfloop flow, removed 17 redundant places. [2023-08-30 07:11:51,483 INFO L231 Difference]: Finished difference. Result has 358 places, 493 transitions, 8072 flow [2023-08-30 07:11:51,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=7520, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8072, PETRI_PLACES=358, PETRI_TRANSITIONS=493} [2023-08-30 07:11:51,484 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 329 predicate places. [2023-08-30 07:11:51,484 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 493 transitions, 8072 flow [2023-08-30 07:11:51,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 71.81481481481481) internal successors, (1939), 27 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:51,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:51,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:51,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:51,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:51,690 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:51,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:51,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1841273228, now seen corresponding path program 27 times [2023-08-30 07:11:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:51,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332490272] [2023-08-30 07:11:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:51,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332490272] [2023-08-30 07:11:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332490272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971831358] [2023-08-30 07:11:51,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:11:51,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:51,924 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:51,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 07:11:51,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:11:51,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:11:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:52,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:52,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971831358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:52,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:52,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 07:11:52,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232788880] [2023-08-30 07:11:52,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:52,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 07:11:52,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:52,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 07:11:52,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-08-30 07:11:52,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:52,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 493 transitions, 8072 flow. Second operand has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:52,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:52,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:52,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:11:55,029 INFO L130 PetriNetUnfolder]: 2022/4294 cut-off events. [2023-08-30 07:11:55,029 INFO L131 PetriNetUnfolder]: For 176507/176507 co-relation queries the response was YES. [2023-08-30 07:11:55,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39224 conditions, 4294 events. 2022/4294 cut-off events. For 176507/176507 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34344 event pairs, 96 based on Foata normal form. 25/4319 useless extension candidates. Maximal degree in co-relation 39114. Up to 1357 conditions per place. [2023-08-30 07:11:55,068 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 370 selfloop transitions, 414 changer transitions 54/838 dead transitions. [2023-08-30 07:11:55,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 838 transitions, 15302 flow [2023-08-30 07:11:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 07:11:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 07:11:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3451 transitions. [2023-08-30 07:11:55,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214704445530044 [2023-08-30 07:11:55,071 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3451 transitions. [2023-08-30 07:11:55,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3451 transitions. [2023-08-30 07:11:55,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:11:55,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3451 transitions. [2023-08-30 07:11:55,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 75.02173913043478) internal successors, (3451), 46 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:55,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 178.0) internal successors, (8366), 47 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:55,081 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 178.0) internal successors, (8366), 47 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:55,081 INFO L175 Difference]: Start difference. First operand has 358 places, 493 transitions, 8072 flow. Second operand 46 states and 3451 transitions. [2023-08-30 07:11:55,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 838 transitions, 15302 flow [2023-08-30 07:11:55,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 838 transitions, 15002 flow, removed 91 selfloop flow, removed 18 redundant places. [2023-08-30 07:11:55,700 INFO L231 Difference]: Finished difference. Result has 393 places, 650 transitions, 12108 flow [2023-08-30 07:11:55,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=7826, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=12108, PETRI_PLACES=393, PETRI_TRANSITIONS=650} [2023-08-30 07:11:55,701 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 364 predicate places. [2023-08-30 07:11:55,701 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 650 transitions, 12108 flow [2023-08-30 07:11:55,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:55,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:11:55,702 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:11:55,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 07:11:55,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:55,907 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:11:55,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:11:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash -595608552, now seen corresponding path program 28 times [2023-08-30 07:11:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:11:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994590057] [2023-08-30 07:11:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:11:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:11:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:11:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:56,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:11:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994590057] [2023-08-30 07:11:56,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994590057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:11:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960149629] [2023-08-30 07:11:56,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:11:56,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:11:56,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:56,129 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:11:56,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 07:11:56,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:11:56,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:11:56,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 07:11:56,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:11:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:56,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:11:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:11:56,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960149629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:11:56,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:11:56,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 07:11:56,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395516910] [2023-08-30 07:11:56,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:11:56,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 07:11:56,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:11:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 07:11:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2023-08-30 07:11:57,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:11:57,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 650 transitions, 12108 flow. Second operand has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:11:57,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:11:57,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:11:57,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:00,958 INFO L130 PetriNetUnfolder]: 3255/7030 cut-off events. [2023-08-30 07:12:00,958 INFO L131 PetriNetUnfolder]: For 369005/369005 co-relation queries the response was YES. [2023-08-30 07:12:01,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72880 conditions, 7030 events. 3255/7030 cut-off events. For 369005/369005 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 62051 event pairs, 215 based on Foata normal form. 24/7054 useless extension candidates. Maximal degree in co-relation 72756. Up to 2509 conditions per place. [2023-08-30 07:12:01,026 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 596 selfloop transitions, 584 changer transitions 30/1210 dead transitions. [2023-08-30 07:12:01,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1210 transitions, 26081 flow [2023-08-30 07:12:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 07:12:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 07:12:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4288 transitions. [2023-08-30 07:12:01,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226296077271831 [2023-08-30 07:12:01,030 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4288 transitions. [2023-08-30 07:12:01,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4288 transitions. [2023-08-30 07:12:01,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:01,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4288 transitions. [2023-08-30 07:12:01,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 75.2280701754386) internal successors, (4288), 57 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:01,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 178.0) internal successors, (10324), 58 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:01,040 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 178.0) internal successors, (10324), 58 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:01,040 INFO L175 Difference]: Start difference. First operand has 393 places, 650 transitions, 12108 flow. Second operand 57 states and 4288 transitions. [2023-08-30 07:12:01,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1210 transitions, 26081 flow [2023-08-30 07:12:02,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1210 transitions, 24099 flow, removed 892 selfloop flow, removed 26 redundant places. [2023-08-30 07:12:02,783 INFO L231 Difference]: Finished difference. Result has 436 places, 937 transitions, 19699 flow [2023-08-30 07:12:02,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=11223, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=19699, PETRI_PLACES=436, PETRI_TRANSITIONS=937} [2023-08-30 07:12:02,784 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 407 predicate places. [2023-08-30 07:12:02,784 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 937 transitions, 19699 flow [2023-08-30 07:12:02,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:02,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:02,784 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:02,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:02,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:02,985 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:12:02,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:02,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1123329800, now seen corresponding path program 29 times [2023-08-30 07:12:02,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:02,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559324391] [2023-08-30 07:12:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:02,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559324391] [2023-08-30 07:12:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559324391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132450935] [2023-08-30 07:12:03,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:12:03,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:03,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:03,168 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:03,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 07:12:03,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 07:12:03,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:03,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:12:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:03,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:03,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132450935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:03,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:03,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-30 07:12:03,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612572512] [2023-08-30 07:12:03,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 07:12:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 07:12:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2023-08-30 07:12:03,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:12:03,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 937 transitions, 19699 flow. Second operand has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:03,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:03,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:12:03,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:07,822 INFO L130 PetriNetUnfolder]: 3580/7585 cut-off events. [2023-08-30 07:12:07,822 INFO L131 PetriNetUnfolder]: For 521249/521249 co-relation queries the response was YES. [2023-08-30 07:12:07,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84819 conditions, 7585 events. 3580/7585 cut-off events. For 521249/521249 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 66654 event pairs, 231 based on Foata normal form. 72/7657 useless extension candidates. Maximal degree in co-relation 84680. Up to 2511 conditions per place. [2023-08-30 07:12:07,907 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 512 selfloop transitions, 495 changer transitions 291/1298 dead transitions. [2023-08-30 07:12:07,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1298 transitions, 30086 flow [2023-08-30 07:12:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 07:12:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 07:12:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3743 transitions. [2023-08-30 07:12:07,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420561797752809 [2023-08-30 07:12:07,911 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3743 transitions. [2023-08-30 07:12:07,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3743 transitions. [2023-08-30 07:12:07,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:07,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3743 transitions. [2023-08-30 07:12:07,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 74.86) internal successors, (3743), 50 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:07,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:07,920 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:07,920 INFO L175 Difference]: Start difference. First operand has 436 places, 937 transitions, 19699 flow. Second operand 50 states and 3743 transitions. [2023-08-30 07:12:07,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1298 transitions, 30086 flow [2023-08-30 07:12:10,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1298 transitions, 27964 flow, removed 878 selfloop flow, removed 28 redundant places. [2023-08-30 07:12:10,829 INFO L231 Difference]: Finished difference. Result has 472 places, 845 transitions, 19049 flow [2023-08-30 07:12:10,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=17874, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=937, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=19049, PETRI_PLACES=472, PETRI_TRANSITIONS=845} [2023-08-30 07:12:10,830 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 443 predicate places. [2023-08-30 07:12:10,830 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 845 transitions, 19049 flow [2023-08-30 07:12:10,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:10,830 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:10,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:11,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 07:12:11,031 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:12:11,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash 198716070, now seen corresponding path program 30 times [2023-08-30 07:12:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:11,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410538662] [2023-08-30 07:12:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:11,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:11,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410538662] [2023-08-30 07:12:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410538662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877160403] [2023-08-30 07:12:11,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:12:11,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:11,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:11,249 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:11,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 07:12:11,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 07:12:11,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:12:11,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:11,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:11,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877160403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:11,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:11,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 07:12:11,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353107544] [2023-08-30 07:12:11,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:11,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 07:12:11,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 07:12:11,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2023-08-30 07:12:11,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:12:11,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 845 transitions, 19049 flow. Second operand has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:11,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:11,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:12:11,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:15,570 INFO L130 PetriNetUnfolder]: 3222/6960 cut-off events. [2023-08-30 07:12:15,571 INFO L131 PetriNetUnfolder]: For 605325/605325 co-relation queries the response was YES. [2023-08-30 07:12:15,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81609 conditions, 6960 events. 3222/6960 cut-off events. For 605325/605325 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 61211 event pairs, 158 based on Foata normal form. 41/7001 useless extension candidates. Maximal degree in co-relation 81458. Up to 1790 conditions per place. [2023-08-30 07:12:15,650 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 417 selfloop transitions, 581 changer transitions 30/1028 dead transitions. [2023-08-30 07:12:15,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1028 transitions, 24834 flow [2023-08-30 07:12:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 07:12:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 07:12:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2612 transitions. [2023-08-30 07:12:15,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192616372391653 [2023-08-30 07:12:15,652 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2612 transitions. [2023-08-30 07:12:15,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2612 transitions. [2023-08-30 07:12:15,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:15,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2612 transitions. [2023-08-30 07:12:15,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.62857142857143) internal successors, (2612), 35 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:15,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:15,657 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:15,657 INFO L175 Difference]: Start difference. First operand has 472 places, 845 transitions, 19049 flow. Second operand 35 states and 2612 transitions. [2023-08-30 07:12:15,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1028 transitions, 24834 flow [2023-08-30 07:12:18,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1028 transitions, 22490 flow, removed 990 selfloop flow, removed 41 redundant places. [2023-08-30 07:12:18,818 INFO L231 Difference]: Finished difference. Result has 436 places, 904 transitions, 20487 flow [2023-08-30 07:12:18,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=17051, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=20487, PETRI_PLACES=436, PETRI_TRANSITIONS=904} [2023-08-30 07:12:18,819 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 407 predicate places. [2023-08-30 07:12:18,819 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 904 transitions, 20487 flow [2023-08-30 07:12:18,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:18,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:18,820 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:18,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-30 07:12:19,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 07:12:19,020 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:12:19,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash 116348760, now seen corresponding path program 31 times [2023-08-30 07:12:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:19,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101131929] [2023-08-30 07:12:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:19,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:19,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101131929] [2023-08-30 07:12:19,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101131929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:19,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654470943] [2023-08-30 07:12:19,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:12:19,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:19,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:19,198 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:19,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 07:12:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:12:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:19,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:19,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654470943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:19,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:19,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 07:12:19,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211546340] [2023-08-30 07:12:19,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:19,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 07:12:19,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:19,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 07:12:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2023-08-30 07:12:19,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:12:19,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 904 transitions, 20487 flow. Second operand has 28 states, 28 states have (on average 71.64285714285714) internal successors, (2006), 28 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:19,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:19,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:12:19,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:23,450 INFO L130 PetriNetUnfolder]: 3179/6630 cut-off events. [2023-08-30 07:12:23,450 INFO L131 PetriNetUnfolder]: For 551939/551939 co-relation queries the response was YES. [2023-08-30 07:12:23,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76853 conditions, 6630 events. 3179/6630 cut-off events. For 551939/551939 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 56019 event pairs, 160 based on Foata normal form. 70/6700 useless extension candidates. Maximal degree in co-relation 76709. Up to 2518 conditions per place. [2023-08-30 07:12:23,524 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 482 selfloop transitions, 488 changer transitions 46/1016 dead transitions. [2023-08-30 07:12:23,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1016 transitions, 24387 flow [2023-08-30 07:12:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 07:12:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 07:12:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2972 transitions. [2023-08-30 07:12:23,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174157303370786 [2023-08-30 07:12:23,526 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2972 transitions. [2023-08-30 07:12:23,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2972 transitions. [2023-08-30 07:12:23,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:23,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2972 transitions. [2023-08-30 07:12:23,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 74.3) internal successors, (2972), 40 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:23,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 178.0) internal successors, (7298), 41 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:23,534 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 178.0) internal successors, (7298), 41 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:23,534 INFO L175 Difference]: Start difference. First operand has 436 places, 904 transitions, 20487 flow. Second operand 40 states and 2972 transitions. [2023-08-30 07:12:23,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1016 transitions, 24387 flow [2023-08-30 07:12:26,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1016 transitions, 23396 flow, removed 364 selfloop flow, removed 23 redundant places. [2023-08-30 07:12:26,340 INFO L231 Difference]: Finished difference. Result has 454 places, 880 transitions, 20096 flow [2023-08-30 07:12:26,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=19608, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20096, PETRI_PLACES=454, PETRI_TRANSITIONS=880} [2023-08-30 07:12:26,341 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 425 predicate places. [2023-08-30 07:12:26,341 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 880 transitions, 20096 flow [2023-08-30 07:12:26,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.64285714285714) internal successors, (2006), 28 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:26,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:26,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:26,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:26,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 07:12:26,542 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:12:26,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1917654422, now seen corresponding path program 32 times [2023-08-30 07:12:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:26,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424225316] [2023-08-30 07:12:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:26,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:26,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:26,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424225316] [2023-08-30 07:12:26,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424225316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:26,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252850951] [2023-08-30 07:12:26,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:12:26,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:26,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:26,772 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:26,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 07:12:26,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:12:26,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:26,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:12:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:26,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:27,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252850951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:27,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:27,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 07:12:27,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430259814] [2023-08-30 07:12:27,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:27,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 07:12:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 07:12:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-08-30 07:12:27,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:12:27,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 880 transitions, 20096 flow. Second operand has 27 states, 27 states have (on average 71.62962962962963) internal successors, (1934), 27 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:27,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:27,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:12:27,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:31,428 INFO L130 PetriNetUnfolder]: 3767/7754 cut-off events. [2023-08-30 07:12:31,428 INFO L131 PetriNetUnfolder]: For 628105/628105 co-relation queries the response was YES. [2023-08-30 07:12:31,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92341 conditions, 7754 events. 3767/7754 cut-off events. For 628105/628105 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 66791 event pairs, 322 based on Foata normal form. 44/7798 useless extension candidates. Maximal degree in co-relation 92202. Up to 3059 conditions per place. [2023-08-30 07:12:31,625 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 558 selfloop transitions, 480 changer transitions 267/1305 dead transitions. [2023-08-30 07:12:31,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1305 transitions, 32226 flow [2023-08-30 07:12:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 07:12:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 07:12:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3572 transitions. [2023-08-30 07:12:31,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41807116104868913 [2023-08-30 07:12:31,628 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3572 transitions. [2023-08-30 07:12:31,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3572 transitions. [2023-08-30 07:12:31,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:31,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3572 transitions. [2023-08-30 07:12:31,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 74.41666666666667) internal successors, (3572), 48 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:31,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 178.0) internal successors, (8722), 49 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:31,635 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 178.0) internal successors, (8722), 49 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:31,636 INFO L175 Difference]: Start difference. First operand has 454 places, 880 transitions, 20096 flow. Second operand 48 states and 3572 transitions. [2023-08-30 07:12:31,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1305 transitions, 32226 flow [2023-08-30 07:12:34,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1305 transitions, 30206 flow, removed 611 selfloop flow, removed 38 redundant places. [2023-08-30 07:12:34,675 INFO L231 Difference]: Finished difference. Result has 481 places, 915 transitions, 22530 flow [2023-08-30 07:12:34,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=18876, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=22530, PETRI_PLACES=481, PETRI_TRANSITIONS=915} [2023-08-30 07:12:34,676 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 452 predicate places. [2023-08-30 07:12:34,676 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 915 transitions, 22530 flow [2023-08-30 07:12:34,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 71.62962962962963) internal successors, (1934), 27 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:34,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:34,676 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:34,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:34,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 07:12:34,881 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:12:34,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 236954636, now seen corresponding path program 33 times [2023-08-30 07:12:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:34,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444538954] [2023-08-30 07:12:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:35,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:35,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444538954] [2023-08-30 07:12:35,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444538954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:35,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439802557] [2023-08-30 07:12:35,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:12:35,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:35,105 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:35,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 07:12:35,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 07:12:35,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:12:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:35,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439802557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:35,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:35,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-08-30 07:12:35,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102229228] [2023-08-30 07:12:35,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:35,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 07:12:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:35,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 07:12:35,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-08-30 07:12:35,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:12:35,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 915 transitions, 22530 flow. Second operand has 26 states, 26 states have (on average 71.65384615384616) internal successors, (1863), 26 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:35,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:35,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:12:35,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:39,890 INFO L130 PetriNetUnfolder]: 3907/8004 cut-off events. [2023-08-30 07:12:39,890 INFO L131 PetriNetUnfolder]: For 631234/631234 co-relation queries the response was YES. [2023-08-30 07:12:39,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95174 conditions, 8004 events. 3907/8004 cut-off events. For 631234/631234 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 68887 event pairs, 510 based on Foata normal form. 18/8022 useless extension candidates. Maximal degree in co-relation 95024. Up to 5426 conditions per place. [2023-08-30 07:12:40,010 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 871 selfloop transitions, 286 changer transitions 121/1278 dead transitions. [2023-08-30 07:12:40,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1278 transitions, 31311 flow [2023-08-30 07:12:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 07:12:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 07:12:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3671 transitions. [2023-08-30 07:12:40,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42088970419628524 [2023-08-30 07:12:40,014 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3671 transitions. [2023-08-30 07:12:40,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3671 transitions. [2023-08-30 07:12:40,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:40,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3671 transitions. [2023-08-30 07:12:40,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 74.91836734693878) internal successors, (3671), 49 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:40,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 178.0) internal successors, (8900), 50 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:40,022 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 178.0) internal successors, (8900), 50 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:40,022 INFO L175 Difference]: Start difference. First operand has 481 places, 915 transitions, 22530 flow. Second operand 49 states and 3671 transitions. [2023-08-30 07:12:40,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1278 transitions, 31311 flow [2023-08-30 07:12:43,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1278 transitions, 29559 flow, removed 508 selfloop flow, removed 44 redundant places. [2023-08-30 07:12:43,219 INFO L231 Difference]: Finished difference. Result has 483 places, 1016 transitions, 24547 flow [2023-08-30 07:12:43,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=21023, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=24547, PETRI_PLACES=483, PETRI_TRANSITIONS=1016} [2023-08-30 07:12:43,220 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 454 predicate places. [2023-08-30 07:12:43,220 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 1016 transitions, 24547 flow [2023-08-30 07:12:43,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.65384615384616) internal successors, (1863), 26 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:43,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:43,221 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:43,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:43,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 07:12:43,422 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:12:43,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1646378006, now seen corresponding path program 34 times [2023-08-30 07:12:43,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:43,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91026605] [2023-08-30 07:12:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:43,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:43,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:43,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91026605] [2023-08-30 07:12:43,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91026605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:43,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138615843] [2023-08-30 07:12:43,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:12:43,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:43,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:43,650 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:43,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 07:12:43,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:12:43,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:43,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:12:43,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:43,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:44,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138615843] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:44,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:44,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 07:12:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967147370] [2023-08-30 07:12:44,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 07:12:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 07:12:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-08-30 07:12:44,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:12:44,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 1016 transitions, 24547 flow. Second operand has 27 states, 27 states have (on average 71.66666666666667) internal successors, (1935), 27 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:44,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:44,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:12:44,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:48,335 INFO L130 PetriNetUnfolder]: 3804/7699 cut-off events. [2023-08-30 07:12:48,335 INFO L131 PetriNetUnfolder]: For 654166/654166 co-relation queries the response was YES. [2023-08-30 07:12:48,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93457 conditions, 7699 events. 3804/7699 cut-off events. For 654166/654166 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 64918 event pairs, 494 based on Foata normal form. 32/7731 useless extension candidates. Maximal degree in co-relation 93298. Up to 5630 conditions per place. [2023-08-30 07:12:48,440 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 874 selfloop transitions, 202 changer transitions 43/1119 dead transitions. [2023-08-30 07:12:48,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1119 transitions, 28599 flow [2023-08-30 07:12:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 07:12:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 07:12:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2665 transitions. [2023-08-30 07:12:48,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158863920099875 [2023-08-30 07:12:48,443 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2665 transitions. [2023-08-30 07:12:48,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2665 transitions. [2023-08-30 07:12:48,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:48,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2665 transitions. [2023-08-30 07:12:48,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 74.02777777777777) internal successors, (2665), 36 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:48,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:48,450 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:48,450 INFO L175 Difference]: Start difference. First operand has 483 places, 1016 transitions, 24547 flow. Second operand 36 states and 2665 transitions. [2023-08-30 07:12:48,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1119 transitions, 28599 flow [2023-08-30 07:12:52,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1119 transitions, 27832 flow, removed 332 selfloop flow, removed 34 redundant places. [2023-08-30 07:12:52,259 INFO L231 Difference]: Finished difference. Result has 469 places, 1011 transitions, 24185 flow [2023-08-30 07:12:52,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=23879, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24185, PETRI_PLACES=469, PETRI_TRANSITIONS=1011} [2023-08-30 07:12:52,260 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 440 predicate places. [2023-08-30 07:12:52,260 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1011 transitions, 24185 flow [2023-08-30 07:12:52,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 71.66666666666667) internal successors, (1935), 27 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:52,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:52,261 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:52,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:52,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:52,462 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:12:52,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1609219385, now seen corresponding path program 35 times [2023-08-30 07:12:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:52,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069698275] [2023-08-30 07:12:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:52,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069698275] [2023-08-30 07:12:52,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069698275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:52,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529847635] [2023-08-30 07:12:52,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:12:52,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:52,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:52,707 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:52,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 07:12:52,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:12:52,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:52,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 07:12:52,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:52,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529847635] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:53,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:12:53,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-30 07:12:53,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591001674] [2023-08-30 07:12:53,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:53,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 07:12:53,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:12:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 07:12:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-08-30 07:12:53,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:12:53,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1011 transitions, 24185 flow. Second operand has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:53,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:53,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:12:53,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:57,866 INFO L130 PetriNetUnfolder]: 3933/7789 cut-off events. [2023-08-30 07:12:57,866 INFO L131 PetriNetUnfolder]: For 667851/667851 co-relation queries the response was YES. [2023-08-30 07:12:57,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94808 conditions, 7789 events. 3933/7789 cut-off events. For 667851/667851 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 64775 event pairs, 219 based on Foata normal form. 115/7904 useless extension candidates. Maximal degree in co-relation 94665. Up to 2878 conditions per place. [2023-08-30 07:12:57,952 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 582 selfloop transitions, 394 changer transitions 291/1267 dead transitions. [2023-08-30 07:12:57,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1267 transitions, 32295 flow [2023-08-30 07:12:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 07:12:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 07:12:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3707 transitions. [2023-08-30 07:12:57,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41651685393258425 [2023-08-30 07:12:57,955 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3707 transitions. [2023-08-30 07:12:57,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3707 transitions. [2023-08-30 07:12:57,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:57,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3707 transitions. [2023-08-30 07:12:57,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 74.14) internal successors, (3707), 50 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:57,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:57,964 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:57,964 INFO L175 Difference]: Start difference. First operand has 469 places, 1011 transitions, 24185 flow. Second operand 50 states and 3707 transitions. [2023-08-30 07:12:57,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1267 transitions, 32295 flow [2023-08-30 07:13:01,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1267 transitions, 31757 flow, removed 168 selfloop flow, removed 29 redundant places. [2023-08-30 07:13:01,115 INFO L231 Difference]: Finished difference. Result has 493 places, 897 transitions, 21406 flow [2023-08-30 07:13:01,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=23739, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=21406, PETRI_PLACES=493, PETRI_TRANSITIONS=897} [2023-08-30 07:13:01,116 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 464 predicate places. [2023-08-30 07:13:01,116 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 897 transitions, 21406 flow [2023-08-30 07:13:01,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:01,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:01,117 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:01,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:01,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:01,322 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:13:01,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash -377304455, now seen corresponding path program 36 times [2023-08-30 07:13:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:13:01,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799177486] [2023-08-30 07:13:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:01,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:13:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:01,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:13:01,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799177486] [2023-08-30 07:13:01,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799177486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:13:01,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910226486] [2023-08-30 07:13:01,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:13:01,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:13:01,522 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:13:01,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 07:13:01,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:13:01,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:13:01,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 07:13:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:01,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:02,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910226486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:02,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:13:02,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-30 07:13:02,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297496461] [2023-08-30 07:13:02,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:02,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 07:13:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:13:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 07:13:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2023-08-30 07:13:02,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:13:02,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 897 transitions, 21406 flow. Second operand has 30 states, 30 states have (on average 71.56666666666666) internal successors, (2147), 30 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:02,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:02,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:13:02,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:06,736 INFO L130 PetriNetUnfolder]: 3560/6952 cut-off events. [2023-08-30 07:13:06,736 INFO L131 PetriNetUnfolder]: For 514176/514176 co-relation queries the response was YES. [2023-08-30 07:13:06,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83290 conditions, 6952 events. 3560/6952 cut-off events. For 514176/514176 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 53945 event pairs, 110 based on Foata normal form. 81/7033 useless extension candidates. Maximal degree in co-relation 83140. Up to 3350 conditions per place. [2023-08-30 07:13:06,817 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 833 selfloop transitions, 259 changer transitions 282/1374 dead transitions. [2023-08-30 07:13:06,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1374 transitions, 33409 flow [2023-08-30 07:13:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 07:13:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 07:13:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4176 transitions. [2023-08-30 07:13:06,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189406099518459 [2023-08-30 07:13:06,820 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4176 transitions. [2023-08-30 07:13:06,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4176 transitions. [2023-08-30 07:13:06,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:06,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4176 transitions. [2023-08-30 07:13:06,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 74.57142857142857) internal successors, (4176), 56 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:06,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 178.0) internal successors, (10146), 57 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:06,828 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 178.0) internal successors, (10146), 57 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:06,828 INFO L175 Difference]: Start difference. First operand has 493 places, 897 transitions, 21406 flow. Second operand 56 states and 4176 transitions. [2023-08-30 07:13:06,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1374 transitions, 33409 flow [2023-08-30 07:13:08,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1374 transitions, 31634 flow, removed 613 selfloop flow, removed 43 redundant places. [2023-08-30 07:13:08,988 INFO L231 Difference]: Finished difference. Result has 519 places, 977 transitions, 22354 flow [2023-08-30 07:13:08,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=19826, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=22354, PETRI_PLACES=519, PETRI_TRANSITIONS=977} [2023-08-30 07:13:08,989 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 490 predicate places. [2023-08-30 07:13:08,990 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 977 transitions, 22354 flow [2023-08-30 07:13:08,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 71.56666666666666) internal successors, (2147), 30 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:08,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:08,990 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:08,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:09,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:09,193 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:13:09,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash 760726210, now seen corresponding path program 37 times [2023-08-30 07:13:09,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:13:09,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239565574] [2023-08-30 07:13:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:09,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:13:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:09,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:13:09,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239565574] [2023-08-30 07:13:09,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239565574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:13:09,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250834308] [2023-08-30 07:13:09,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:13:09,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:09,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:13:09,401 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:13:09,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 07:13:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 07:13:09,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:09,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:09,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250834308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:09,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:13:09,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-30 07:13:09,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524085965] [2023-08-30 07:13:09,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:09,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 07:13:09,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:13:09,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 07:13:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 07:13:10,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:13:10,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 977 transitions, 22354 flow. Second operand has 34 states, 34 states have (on average 71.5) internal successors, (2431), 34 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:10,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:10,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:13:10,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:15,043 INFO L130 PetriNetUnfolder]: 4032/7791 cut-off events. [2023-08-30 07:13:15,044 INFO L131 PetriNetUnfolder]: For 626501/626501 co-relation queries the response was YES. [2023-08-30 07:13:15,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101780 conditions, 7791 events. 4032/7791 cut-off events. For 626501/626501 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 61022 event pairs, 35 based on Foata normal form. 54/7845 useless extension candidates. Maximal degree in co-relation 101615. Up to 2271 conditions per place. [2023-08-30 07:13:15,151 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 487 selfloop transitions, 923 changer transitions 260/1670 dead transitions. [2023-08-30 07:13:15,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1670 transitions, 41866 flow [2023-08-30 07:13:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 07:13:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 07:13:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4524 transitions. [2023-08-30 07:13:15,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166513170012894 [2023-08-30 07:13:15,154 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4524 transitions. [2023-08-30 07:13:15,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4524 transitions. [2023-08-30 07:13:15,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:15,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4524 transitions. [2023-08-30 07:13:15,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 74.1639344262295) internal successors, (4524), 61 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:15,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 178.0) internal successors, (11036), 62 states have internal predecessors, (11036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:15,163 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 178.0) internal successors, (11036), 62 states have internal predecessors, (11036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:15,163 INFO L175 Difference]: Start difference. First operand has 519 places, 977 transitions, 22354 flow. Second operand 61 states and 4524 transitions. [2023-08-30 07:13:15,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1670 transitions, 41866 flow [2023-08-30 07:13:17,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1670 transitions, 39895 flow, removed 651 selfloop flow, removed 38 redundant places. [2023-08-30 07:13:17,976 INFO L231 Difference]: Finished difference. Result has 528 places, 1313 transitions, 32415 flow [2023-08-30 07:13:17,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=20897, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=32415, PETRI_PLACES=528, PETRI_TRANSITIONS=1313} [2023-08-30 07:13:17,978 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 499 predicate places. [2023-08-30 07:13:17,978 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 1313 transitions, 32415 flow [2023-08-30 07:13:17,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 71.5) internal successors, (2431), 34 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:17,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:17,978 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:17,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:18,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 07:13:18,184 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:13:18,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash -826441784, now seen corresponding path program 38 times [2023-08-30 07:13:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:13:18,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185962841] [2023-08-30 07:13:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:13:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:18,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:13:18,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185962841] [2023-08-30 07:13:18,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185962841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:13:18,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366754446] [2023-08-30 07:13:18,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:13:18,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:18,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:13:18,425 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:13:18,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 07:13:18,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:13:18,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:13:18,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 07:13:18,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:18,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:18,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366754446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:18,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:13:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-08-30 07:13:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635845460] [2023-08-30 07:13:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 07:13:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:13:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 07:13:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-08-30 07:13:19,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:13:19,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1313 transitions, 32415 flow. Second operand has 32 states, 32 states have (on average 71.53125) internal successors, (2289), 32 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:19,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:19,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:13:19,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:25,263 INFO L130 PetriNetUnfolder]: 4564/9272 cut-off events. [2023-08-30 07:13:25,263 INFO L131 PetriNetUnfolder]: For 662743/662743 co-relation queries the response was YES. [2023-08-30 07:13:25,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111843 conditions, 9272 events. 4564/9272 cut-off events. For 662743/662743 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 77338 event pairs, 44 based on Foata normal form. 61/9333 useless extension candidates. Maximal degree in co-relation 111682. Up to 5080 conditions per place. [2023-08-30 07:13:25,377 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 1330 selfloop transitions, 440 changer transitions 363/2133 dead transitions. [2023-08-30 07:13:25,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 2133 transitions, 50794 flow [2023-08-30 07:13:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 07:13:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 07:13:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4824 transitions. [2023-08-30 07:13:25,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41694036300777876 [2023-08-30 07:13:25,381 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4824 transitions. [2023-08-30 07:13:25,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4824 transitions. [2023-08-30 07:13:25,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:25,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4824 transitions. [2023-08-30 07:13:25,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 74.21538461538462) internal successors, (4824), 65 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:25,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 178.0) internal successors, (11748), 66 states have internal predecessors, (11748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:25,394 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 178.0) internal successors, (11748), 66 states have internal predecessors, (11748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:25,394 INFO L175 Difference]: Start difference. First operand has 528 places, 1313 transitions, 32415 flow. Second operand 65 states and 4824 transitions. [2023-08-30 07:13:25,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 2133 transitions, 50794 flow [2023-08-30 07:13:29,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 2133 transitions, 48229 flow, removed 577 selfloop flow, removed 45 redundant places. [2023-08-30 07:13:30,015 INFO L231 Difference]: Finished difference. Result has 568 places, 1608 transitions, 37407 flow [2023-08-30 07:13:30,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=30032, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=37407, PETRI_PLACES=568, PETRI_TRANSITIONS=1608} [2023-08-30 07:13:30,016 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 539 predicate places. [2023-08-30 07:13:30,016 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1608 transitions, 37407 flow [2023-08-30 07:13:30,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 71.53125) internal successors, (2289), 32 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:30,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:30,017 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:30,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:30,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 07:13:30,218 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:13:30,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2115528213, now seen corresponding path program 39 times [2023-08-30 07:13:30,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:13:30,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734020648] [2023-08-30 07:13:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:30,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:13:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:30,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:13:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734020648] [2023-08-30 07:13:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734020648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:13:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005661599] [2023-08-30 07:13:30,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:13:30,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:13:30,473 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:13:30,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 07:13:30,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:13:30,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:13:30,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 07:13:30,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:30,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:13:31,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005661599] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:31,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:13:31,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 31 [2023-08-30 07:13:31,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934409949] [2023-08-30 07:13:31,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:31,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 07:13:31,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:13:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 07:13:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 07:13:31,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:13:31,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1608 transitions, 37407 flow. Second operand has 33 states, 33 states have (on average 71.54545454545455) internal successors, (2361), 33 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:31,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:31,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:13:31,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:38,060 INFO L130 PetriNetUnfolder]: 4944/9899 cut-off events. [2023-08-30 07:13:38,060 INFO L131 PetriNetUnfolder]: For 633540/633540 co-relation queries the response was YES. [2023-08-30 07:13:38,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120648 conditions, 9899 events. 4944/9899 cut-off events. For 633540/633540 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 83239 event pairs, 65 based on Foata normal form. 20/9919 useless extension candidates. Maximal degree in co-relation 120461. Up to 6100 conditions per place. [2023-08-30 07:13:38,191 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 1276 selfloop transitions, 288 changer transitions 622/2186 dead transitions. [2023-08-30 07:13:38,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 2186 transitions, 56074 flow [2023-08-30 07:13:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-30 07:13:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-30 07:13:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3984 transitions. [2023-08-30 07:13:38,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41448189762796506 [2023-08-30 07:13:38,194 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3984 transitions. [2023-08-30 07:13:38,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3984 transitions. [2023-08-30 07:13:38,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:38,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3984 transitions. [2023-08-30 07:13:38,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 73.77777777777777) internal successors, (3984), 54 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:38,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 178.0) internal successors, (9790), 55 states have internal predecessors, (9790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:38,201 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 178.0) internal successors, (9790), 55 states have internal predecessors, (9790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:38,201 INFO L175 Difference]: Start difference. First operand has 568 places, 1608 transitions, 37407 flow. Second operand 54 states and 3984 transitions. [2023-08-30 07:13:38,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 2186 transitions, 56074 flow [2023-08-30 07:13:42,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 2186 transitions, 55231 flow, removed 366 selfloop flow, removed 46 redundant places. [2023-08-30 07:13:42,875 INFO L231 Difference]: Finished difference. Result has 567 places, 1433 transitions, 34493 flow [2023-08-30 07:13:42,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=36592, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=34493, PETRI_PLACES=567, PETRI_TRANSITIONS=1433} [2023-08-30 07:13:42,877 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 538 predicate places. [2023-08-30 07:13:42,877 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1433 transitions, 34493 flow [2023-08-30 07:13:42,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 71.54545454545455) internal successors, (2361), 33 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:42,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:42,877 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:42,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:43,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 07:13:43,078 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:13:43,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:43,079 INFO L85 PathProgramCache]: Analyzing trace with hash 756376304, now seen corresponding path program 40 times [2023-08-30 07:13:43,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:13:43,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752085750] [2023-08-30 07:13:43,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:43,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:13:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:13:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752085750] [2023-08-30 07:13:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752085750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:13:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123809200] [2023-08-30 07:13:43,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:13:43,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:43,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:13:43,314 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:13:43,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 07:13:43,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:13:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:13:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 07:13:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:43,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:13:44,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123809200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:44,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:13:44,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 35 [2023-08-30 07:13:44,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371859236] [2023-08-30 07:13:44,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:44,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 07:13:44,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:13:44,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 07:13:44,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2023-08-30 07:13:44,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:13:44,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1433 transitions, 34493 flow. Second operand has 37 states, 37 states have (on average 71.48648648648648) internal successors, (2645), 37 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:44,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:44,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:13:44,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:50,685 INFO L130 PetriNetUnfolder]: 4935/9960 cut-off events. [2023-08-30 07:13:50,685 INFO L131 PetriNetUnfolder]: For 643777/643777 co-relation queries the response was YES. [2023-08-30 07:13:50,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123418 conditions, 9960 events. 4935/9960 cut-off events. For 643777/643777 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 85106 event pairs, 67 based on Foata normal form. 26/9986 useless extension candidates. Maximal degree in co-relation 123239. Up to 4878 conditions per place. [2023-08-30 07:13:50,823 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 1041 selfloop transitions, 800 changer transitions 213/2054 dead transitions. [2023-08-30 07:13:50,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 2054 transitions, 56116 flow [2023-08-30 07:13:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 07:13:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 07:13:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3631 transitions. [2023-08-30 07:13:50,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41630360009172207 [2023-08-30 07:13:50,826 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3631 transitions. [2023-08-30 07:13:50,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3631 transitions. [2023-08-30 07:13:50,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:50,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3631 transitions. [2023-08-30 07:13:50,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 74.10204081632654) internal successors, (3631), 49 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:50,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 178.0) internal successors, (8900), 50 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:50,837 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 178.0) internal successors, (8900), 50 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:50,837 INFO L175 Difference]: Start difference. First operand has 567 places, 1433 transitions, 34493 flow. Second operand 49 states and 3631 transitions. [2023-08-30 07:13:50,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 2054 transitions, 56116 flow [2023-08-30 07:13:55,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 2054 transitions, 51372 flow, removed 2038 selfloop flow, removed 63 redundant places. [2023-08-30 07:13:55,297 INFO L231 Difference]: Finished difference. Result has 514 places, 1736 transitions, 44296 flow [2023-08-30 07:13:55,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=31931, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=44296, PETRI_PLACES=514, PETRI_TRANSITIONS=1736} [2023-08-30 07:13:55,299 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 485 predicate places. [2023-08-30 07:13:55,299 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1736 transitions, 44296 flow [2023-08-30 07:13:55,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 71.48648648648648) internal successors, (2645), 37 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:55,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:55,299 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:55,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-30 07:13:55,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 07:13:55,500 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:13:55,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash 167905333, now seen corresponding path program 41 times [2023-08-30 07:13:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:13:55,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93882221] [2023-08-30 07:13:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:55,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:13:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:13:55,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:13:55,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93882221] [2023-08-30 07:13:55,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93882221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:13:55,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944062441] [2023-08-30 07:13:55,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:13:55,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:13:55,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:13:55,762 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:13:55,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 07:13:55,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 07:13:55,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:13:55,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 07:13:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:56,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:13:56,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944062441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:56,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:13:56,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 35 [2023-08-30 07:13:56,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017965835] [2023-08-30 07:13:56,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:56,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 07:13:56,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:13:56,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 07:13:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2023-08-30 07:13:56,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:13:56,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1736 transitions, 44296 flow. Second operand has 37 states, 37 states have (on average 71.54054054054055) internal successors, (2647), 37 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:56,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:56,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:13:56,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:14:03,279 INFO L130 PetriNetUnfolder]: 4704/9410 cut-off events. [2023-08-30 07:14:03,279 INFO L131 PetriNetUnfolder]: For 584310/584310 co-relation queries the response was YES. [2023-08-30 07:14:03,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118224 conditions, 9410 events. 4704/9410 cut-off events. For 584310/584310 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 78566 event pairs, 67 based on Foata normal form. 15/9425 useless extension candidates. Maximal degree in co-relation 118046. Up to 3798 conditions per place. [2023-08-30 07:14:03,398 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 626 selfloop transitions, 43 changer transitions 1219/1888 dead transitions. [2023-08-30 07:14:03,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1888 transitions, 51637 flow [2023-08-30 07:14:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 07:14:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 07:14:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2734 transitions. [2023-08-30 07:14:03,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415122988156696 [2023-08-30 07:14:03,400 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2734 transitions. [2023-08-30 07:14:03,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2734 transitions. [2023-08-30 07:14:03,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:14:03,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2734 transitions. [2023-08-30 07:14:03,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.89189189189189) internal successors, (2734), 37 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:03,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 178.0) internal successors, (6764), 38 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:03,407 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 178.0) internal successors, (6764), 38 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:03,408 INFO L175 Difference]: Start difference. First operand has 514 places, 1736 transitions, 44296 flow. Second operand 37 states and 2734 transitions. [2023-08-30 07:14:03,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1888 transitions, 51637 flow [2023-08-30 07:14:08,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1888 transitions, 48849 flow, removed 1184 selfloop flow, removed 35 redundant places. [2023-08-30 07:14:08,171 INFO L231 Difference]: Finished difference. Result has 499 places, 652 transitions, 12999 flow [2023-08-30 07:14:08,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=41950, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=12999, PETRI_PLACES=499, PETRI_TRANSITIONS=652} [2023-08-30 07:14:08,172 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 470 predicate places. [2023-08-30 07:14:08,172 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 652 transitions, 12999 flow [2023-08-30 07:14:08,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 71.54054054054055) internal successors, (2647), 37 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:08,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:14:08,173 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:14:08,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 07:14:08,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:14:08,374 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:14:08,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:14:08,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1690615057, now seen corresponding path program 42 times [2023-08-30 07:14:08,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:14:08,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41384604] [2023-08-30 07:14:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:14:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:14:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:14:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:14:08,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:14:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41384604] [2023-08-30 07:14:08,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41384604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:14:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112039958] [2023-08-30 07:14:08,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:14:08,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:14:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:14:08,672 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:14:08,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 07:14:08,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 07:14:08,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:14:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 07:14:08,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:14:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:14:09,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:14:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:14:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112039958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:14:09,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:14:09,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 37 [2023-08-30 07:14:09,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032966036] [2023-08-30 07:14:09,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:14:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 07:14:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:14:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 07:14:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 07:14:09,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:14:09,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 652 transitions, 12999 flow. Second operand has 39 states, 39 states have (on average 71.51282051282051) internal successors, (2789), 39 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:09,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:14:09,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:14:09,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:14:15,337 INFO L130 PetriNetUnfolder]: 4392/9267 cut-off events. [2023-08-30 07:14:15,337 INFO L131 PetriNetUnfolder]: For 566098/566098 co-relation queries the response was YES. [2023-08-30 07:14:15,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98415 conditions, 9267 events. 4392/9267 cut-off events. For 566098/566098 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 80388 event pairs, 0 based on Foata normal form. 38/9305 useless extension candidates. Maximal degree in co-relation 98251. Up to 3243 conditions per place. [2023-08-30 07:14:15,451 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 153 selfloop transitions, 1226 changer transitions 222/1601 dead transitions. [2023-08-30 07:14:15,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1601 transitions, 33934 flow [2023-08-30 07:14:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-30 07:14:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-30 07:14:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5244 transitions. [2023-08-30 07:14:15,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41493907263807567 [2023-08-30 07:14:15,455 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5244 transitions. [2023-08-30 07:14:15,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5244 transitions. [2023-08-30 07:14:15,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:14:15,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5244 transitions. [2023-08-30 07:14:15,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 73.85915492957747) internal successors, (5244), 71 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:15,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 178.0) internal successors, (12816), 72 states have internal predecessors, (12816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:15,566 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 178.0) internal successors, (12816), 72 states have internal predecessors, (12816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:15,566 INFO L175 Difference]: Start difference. First operand has 499 places, 652 transitions, 12999 flow. Second operand 71 states and 5244 transitions. [2023-08-30 07:14:15,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1601 transitions, 33934 flow [2023-08-30 07:14:17,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1601 transitions, 31801 flow, removed 622 selfloop flow, removed 79 redundant places. [2023-08-30 07:14:17,708 INFO L231 Difference]: Finished difference. Result has 344 places, 1302 transitions, 28198 flow [2023-08-30 07:14:17,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=11968, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=28198, PETRI_PLACES=344, PETRI_TRANSITIONS=1302} [2023-08-30 07:14:17,709 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 315 predicate places. [2023-08-30 07:14:17,709 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1302 transitions, 28198 flow [2023-08-30 07:14:17,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.51282051282051) internal successors, (2789), 39 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:17,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:14:17,709 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:14:17,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-30 07:14:17,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 07:14:17,910 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 07:14:17,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:14:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash -548864286, now seen corresponding path program 43 times [2023-08-30 07:14:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:14:17,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448885825] [2023-08-30 07:14:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:14:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:14:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:14:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:14:18,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:14:18,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448885825] [2023-08-30 07:14:18,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448885825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:14:18,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730700909] [2023-08-30 07:14:18,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:14:18,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:14:18,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:14:18,237 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:14:18,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 07:14:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:14:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 07:14:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:14:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:14:18,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:14:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:14:19,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730700909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:14:19,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:14:19,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 40 [2023-08-30 07:14:19,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773981700] [2023-08-30 07:14:19,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:14:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 07:14:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:14:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 07:14:19,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 07:14:19,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 07:14:19,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1302 transitions, 28198 flow. Second operand has 42 states, 42 states have (on average 71.42857142857143) internal successors, (3000), 42 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:19,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:14:19,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 07:14:19,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:14:24,285 INFO L130 PetriNetUnfolder]: 3634/7788 cut-off events. [2023-08-30 07:14:24,286 INFO L131 PetriNetUnfolder]: For 217659/217659 co-relation queries the response was YES. [2023-08-30 07:14:24,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78090 conditions, 7788 events. 3634/7788 cut-off events. For 217659/217659 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 66539 event pairs, 0 based on Foata normal form. 49/7835 useless extension candidates. Maximal degree in co-relation 77958. Up to 2855 conditions per place. [2023-08-30 07:14:24,352 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 0 selfloop transitions, 0 changer transitions 1490/1490 dead transitions. [2023-08-30 07:14:24,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1490 transitions, 33920 flow [2023-08-30 07:14:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 07:14:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 07:14:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3759 transitions. [2023-08-30 07:14:24,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140779907468605 [2023-08-30 07:14:24,354 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3759 transitions. [2023-08-30 07:14:24,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3759 transitions. [2023-08-30 07:14:24,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:14:24,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3759 transitions. [2023-08-30 07:14:24,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 73.70588235294117) internal successors, (3759), 51 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:24,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 178.0) internal successors, (9256), 52 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:24,362 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 178.0) internal successors, (9256), 52 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:24,362 INFO L175 Difference]: Start difference. First operand has 344 places, 1302 transitions, 28198 flow. Second operand 51 states and 3759 transitions. [2023-08-30 07:14:24,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1490 transitions, 33920 flow [2023-08-30 07:14:26,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1490 transitions, 31601 flow, removed 674 selfloop flow, removed 50 redundant places. [2023-08-30 07:14:26,319 INFO L231 Difference]: Finished difference. Result has 316 places, 0 transitions, 0 flow [2023-08-30 07:14:26,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=26101, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=0, PETRI_PLACES=316, PETRI_TRANSITIONS=0} [2023-08-30 07:14:26,320 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 287 predicate places. [2023-08-30 07:14:26,320 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 0 transitions, 0 flow [2023-08-30 07:14:26,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 71.42857142857143) internal successors, (3000), 42 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:26,323 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2023-08-30 07:14:26,323 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-08-30 07:14:26,323 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-08-30 07:14:26,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-30 07:14:26,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-08-30 07:14:26,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-08-30 07:14:26,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-08-30 07:14:26,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2023-08-30 07:14:26,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-08-30 07:14:26,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-08-30 07:14:26,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-08-30 07:14:26,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2023-08-30 07:14:26,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 07:14:26,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 07:14:26,528 INFO L445 BasicCegarLoop]: Path program histogram: [43, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:14:26,531 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 07:14:26,531 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 07:14:26,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 07:14:26 BasicIcfg [2023-08-30 07:14:26,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 07:14:26,534 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 07:14:26,534 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 07:14:26,535 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 07:14:26,535 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:10:39" (3/4) ... [2023-08-30 07:14:26,537 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 07:14:26,542 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 07:14:26,542 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 07:14:26,545 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2023-08-30 07:14:26,545 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 07:14:26,545 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 07:14:26,546 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 07:14:26,577 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 07:14:26,577 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 07:14:26,578 INFO L158 Benchmark]: Toolchain (without parser) took 227531.71ms. Allocated memory was 98.6MB in the beginning and 8.0GB in the end (delta: 7.9GB). Free memory was 77.6MB in the beginning and 7.1GB in the end (delta: -7.0GB). Peak memory consumption was 870.9MB. Max. memory is 16.1GB. [2023-08-30 07:14:26,578 INFO L158 Benchmark]: CDTParser took 0.91ms. Allocated memory is still 73.4MB. Free memory was 52.1MB in the beginning and 52.0MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:14:26,578 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.68ms. Allocated memory is still 98.6MB. Free memory was 77.2MB in the beginning and 65.9MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:14:26,579 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.50ms. Allocated memory is still 98.6MB. Free memory was 65.9MB in the beginning and 64.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:14:26,579 INFO L158 Benchmark]: Boogie Preprocessor took 43.76ms. Allocated memory is still 98.6MB. Free memory was 64.3MB in the beginning and 63.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:14:26,579 INFO L158 Benchmark]: RCFGBuilder took 499.58ms. Allocated memory is still 98.6MB. Free memory was 63.0MB in the beginning and 74.4MB in the end (delta: -11.4MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. [2023-08-30 07:14:26,579 INFO L158 Benchmark]: TraceAbstraction took 226631.91ms. Allocated memory was 98.6MB in the beginning and 8.0GB in the end (delta: 7.9GB). Free memory was 73.7MB in the beginning and 7.1GB in the end (delta: -7.0GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2023-08-30 07:14:26,580 INFO L158 Benchmark]: Witness Printer took 43.36ms. Allocated memory is still 8.0GB. Free memory was 7.1GB in the beginning and 7.1GB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 07:14:26,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91ms. Allocated memory is still 73.4MB. Free memory was 52.1MB in the beginning and 52.0MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 257.68ms. Allocated memory is still 98.6MB. Free memory was 77.2MB in the beginning and 65.9MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.50ms. Allocated memory is still 98.6MB. Free memory was 65.9MB in the beginning and 64.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 43.76ms. Allocated memory is still 98.6MB. Free memory was 64.3MB in the beginning and 63.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 499.58ms. Allocated memory is still 98.6MB. Free memory was 63.0MB in the beginning and 74.4MB in the end (delta: -11.4MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. * TraceAbstraction took 226631.91ms. Allocated memory was 98.6MB in the beginning and 8.0GB in the end (delta: 7.9GB). Free memory was 73.7MB in the beginning and 7.1GB in the end (delta: -7.0GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Witness Printer took 43.36ms. Allocated memory is still 8.0GB. Free memory was 7.1GB in the beginning and 7.1GB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 88 PlacesBefore, 29 PlacesAfterwards, 87 TransitionsBefore, 24 TransitionsAfterwards, 540 CoEnabledTransitionPairs, 6 FixpointIterations, 53 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 85 TotalNumberOfCompositions, 633 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 621, independent: 619, independent conditional: 0, independent unconditional: 619, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 278, independent: 276, independent conditional: 0, independent unconditional: 276, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 621, independent: 343, independent conditional: 0, independent unconditional: 343, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 278, unknown conditional: 0, unknown unconditional: 278] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 78]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 64]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 105 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 226.5s, OverallIterations: 50, TraceHistogramMax: 8, PathProgramHistogramMax: 43, EmptinessCheckTime: 0.0s, AutomataDifference: 179.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12051 SdHoareTripleChecker+Valid, 26.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11467 mSDsluCounter, 10584 SdHoareTripleChecker+Invalid, 21.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10320 mSDsCounter, 2060 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 61812 IncrementalHoareTripleChecker+Invalid, 63872 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2060 mSolverCounterUnsat, 264 mSDtfsCounter, 61812 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3087 GetRequests, 723 SyntacticMatches, 56 SemanticMatches, 2308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42205 ImplicationChecksByTransitivity, 44.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44296occurred in iteration=47, InterpolantAutomatonStates: 1623, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 30.9s InterpolantComputationTime, 1552 NumberOfCodeBlocks, 1552 NumberOfCodeBlocksAsserted, 157 NumberOfCheckSat, 2175 ConstructedInterpolants, 0 QuantifiedInterpolants, 27697 SizeOfPredicates, 269 NumberOfNonLiveVariables, 6194 ConjunctsInSsa, 1176 ConjunctsInUnsatCore, 138 InterpolantComputations, 6 PerfectInterpolantSequences, 58/1167 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 07:14:26,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE