./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i -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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:27:57,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:27:57,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:27:57,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:27:57,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:27:57,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:27:57,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:27:57,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:27:57,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:27:57,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:27:57,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:27:57,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:27:57,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:27:57,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:27:57,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:27:57,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:27:57,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:27:57,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:27:57,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:27:57,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:27:57,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:27:57,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:27:57,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:27:57,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:27:57,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:27:57,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:27:57,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:27:57,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:27:57,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:27:57,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:27:57,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:27:57,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:27:57,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:27:57,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:27:57,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:27:57,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:27:57,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:27:57,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:27:57,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:27:57,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:27:57,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:27:57,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:27:57,605 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:27:57,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:27:57,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:27:57,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:27:57,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:27:57,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:27:57,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:27:57,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:27:57,609 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:27:57,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:27:57,610 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:27:57,610 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:27:57,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:27:57,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:27:57,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:27:57,610 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:27:57,611 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:27:57,611 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:27:57,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:27:57,611 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:27:57,611 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:27:57,611 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:27:57,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:27:57,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:27:57,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:27:57,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:27:57,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:27:57,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:27:57,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:27:57,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:27:57,613 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:27:57,613 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:27:57,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:27:57,614 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:27:57,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:27:57,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:27:57,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:27:57,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:27:57,876 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:27:57,876 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:27:57,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-09-01 04:27:58,892 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:27:59,132 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:27:59,132 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-09-01 04:27:59,139 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fb1e945f/77bb1ddfd99348f4a2fe495a0c71d7b7/FLAG7860c9745 [2023-09-01 04:27:59,150 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fb1e945f/77bb1ddfd99348f4a2fe495a0c71d7b7 [2023-09-01 04:27:59,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:27:59,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:27:59,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:27:59,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:27:59,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:27:59,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@783578a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59, skipping insertion in model container [2023-09-01 04:27:59,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:27:59,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:27:59,424 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-09-01 04:27:59,430 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-09-01 04:27:59,434 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-09-01 04:27:59,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:27:59,453 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:27:59,485 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-09-01 04:27:59,486 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-09-01 04:27:59,487 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-09-01 04:27:59,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:27:59,526 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:27:59,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59 WrapperNode [2023-09-01 04:27:59,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:27:59,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:27:59,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:27:59,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:27:59,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,581 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2023-09-01 04:27:59,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:27:59,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:27:59,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:27:59,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:27:59,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,616 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:27:59,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:27:59,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:27:59,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:27:59,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (1/1) ... [2023-09-01 04:27:59,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:27:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:59,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 04:27:59,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 04:27:59,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 04:27:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 04:27:59,682 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 04:27:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 04:27:59,682 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 04:27:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 04:27:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 04:27:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:27:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:27:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:27:59,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-09-01 04:27:59,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 04:27:59,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:27:59,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:27:59,684 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:27:59,774 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:27:59,775 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:28:00,036 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:28:00,042 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:28:00,045 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 04:28:00,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:28:00 BoogieIcfgContainer [2023-09-01 04:28:00,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:28:00,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:28:00,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:28:00,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:28:00,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:27:59" (1/3) ... [2023-09-01 04:28:00,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b2a1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:28:00, skipping insertion in model container [2023-09-01 04:28:00,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:59" (2/3) ... [2023-09-01 04:28:00,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b2a1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:28:00, skipping insertion in model container [2023-09-01 04:28:00,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:28:00" (3/3) ... [2023-09-01 04:28:00,053 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-09-01 04:28:00,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:28:00,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 04:28:00,065 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:28:00,173 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:28:00,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 164 transitions, 344 flow [2023-09-01 04:28:00,236 INFO L130 PetriNetUnfolder]: 11/162 cut-off events. [2023-09-01 04:28:00,236 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:28:00,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 162 events. 11/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 345 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-09-01 04:28:00,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 164 transitions, 344 flow [2023-09-01 04:28:00,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 158 transitions, 328 flow [2023-09-01 04:28:00,249 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:28:00,255 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 158 transitions, 328 flow [2023-09-01 04:28:00,257 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 158 transitions, 328 flow [2023-09-01 04:28:00,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 158 transitions, 328 flow [2023-09-01 04:28:00,281 INFO L130 PetriNetUnfolder]: 11/158 cut-off events. [2023-09-01 04:28:00,283 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:28:00,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 158 events. 11/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 345 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-09-01 04:28:00,287 INFO L119 LiptonReduction]: Number of co-enabled transitions 5570 [2023-09-01 04:28:05,020 INFO L134 LiptonReduction]: Checked pairs total: 14674 [2023-09-01 04:28:05,021 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-09-01 04:28:05,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:28:05,045 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;@64ca2a4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:28:05,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-09-01 04:28:05,047 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 04:28:05,047 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:28:05,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:05,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 04:28:05,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:05,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 648, now seen corresponding path program 1 times [2023-09-01 04:28:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:05,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907835060] [2023-09-01 04:28:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:05,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:05,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907835060] [2023-09-01 04:28:05,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907835060] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:05,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:05,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 04:28:05,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889003161] [2023-09-01 04:28:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 04:28:05,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 04:28:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 04:28:05,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 314 [2023-09-01 04:28:05,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 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) [2023-09-01 04:28:05,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:05,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 314 [2023-09-01 04:28:05,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:05,395 INFO L130 PetriNetUnfolder]: 1306/2110 cut-off events. [2023-09-01 04:28:05,396 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-09-01 04:28:05,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 2110 events. 1306/2110 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 11023 event pairs, 994 based on Foata normal form. 48/1126 useless extension candidates. Maximal degree in co-relation 3825. Up to 1926 conditions per place. [2023-09-01 04:28:05,410 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 41 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-09-01 04:28:05,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 192 flow [2023-09-01 04:28:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 04:28:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 04:28:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 348 transitions. [2023-09-01 04:28:05,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554140127388535 [2023-09-01 04:28:05,427 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 348 transitions. [2023-09-01 04:28:05,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 348 transitions. [2023-09-01 04:28:05,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:05,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 348 transitions. [2023-09-01 04:28:05,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,441 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,442 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 116 flow. Second operand 2 states and 348 transitions. [2023-09-01 04:28:05,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 192 flow [2023-09-01 04:28:05,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:28:05,446 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 102 flow [2023-09-01 04:28:05,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2023-09-01 04:28:05,451 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-09-01 04:28:05,451 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 102 flow [2023-09-01 04:28:05,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 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) [2023-09-01 04:28:05,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:05,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:28:05,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 04:28:05,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:05,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash 636707, now seen corresponding path program 1 times [2023-09-01 04:28:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:05,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805021986] [2023-09-01 04:28:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:05,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:05,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:05,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805021986] [2023-09-01 04:28:05,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805021986] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:05,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:05,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216053625] [2023-09-01 04:28:05,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:05,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:05,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-09-01 04:28:05,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:05,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-09-01 04:28:05,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:05,832 INFO L130 PetriNetUnfolder]: 1278/2053 cut-off events. [2023-09-01 04:28:05,832 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:28:05,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 2053 events. 1278/2053 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 10627 event pairs, 972 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 3940. Up to 1874 conditions per place. [2023-09-01 04:28:05,840 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 37 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-09-01 04:28:05,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 176 flow [2023-09-01 04:28:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-09-01 04:28:05,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116772823779193 [2023-09-01 04:28:05,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-09-01 04:28:05,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-09-01 04:28:05,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:05,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-09-01 04:28:05,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,846 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 102 flow. Second operand 3 states and 482 transitions. [2023-09-01 04:28:05,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 176 flow [2023-09-01 04:28:05,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 04:28:05,847 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 102 flow [2023-09-01 04:28:05,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-09-01 04:28:05,848 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-09-01 04:28:05,848 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 102 flow [2023-09-01 04:28:05,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:05,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:28:05,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 04:28:05,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:05,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:05,850 INFO L85 PathProgramCache]: Analyzing trace with hash 636709, now seen corresponding path program 1 times [2023-09-01 04:28:05,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:05,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496742618] [2023-09-01 04:28:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:05,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:05,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496742618] [2023-09-01 04:28:05,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496742618] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:05,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:05,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051704860] [2023-09-01 04:28:05,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:05,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:05,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-09-01 04:28:05,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:05,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:05,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-09-01 04:28:05,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:06,066 INFO L130 PetriNetUnfolder]: 1250/1996 cut-off events. [2023-09-01 04:28:06,066 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:28:06,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3839 conditions, 1996 events. 1250/1996 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10197 event pairs, 950 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 3835. Up to 1824 conditions per place. [2023-09-01 04:28:06,075 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-09-01 04:28:06,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 172 flow [2023-09-01 04:28:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-09-01 04:28:06,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-09-01 04:28:06,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-09-01 04:28:06,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-09-01 04:28:06,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:06,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-09-01 04:28:06,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,081 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 102 flow. Second operand 3 states and 468 transitions. [2023-09-01 04:28:06,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 172 flow [2023-09-01 04:28:06,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:06,083 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 98 flow [2023-09-01 04:28:06,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-09-01 04:28:06,084 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-09-01 04:28:06,084 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 98 flow [2023-09-01 04:28:06,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:06,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:28:06,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 04:28:06,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:06,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:06,086 INFO L85 PathProgramCache]: Analyzing trace with hash 611864871, now seen corresponding path program 1 times [2023-09-01 04:28:06,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:06,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512069958] [2023-09-01 04:28:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:06,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:06,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:06,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512069958] [2023-09-01 04:28:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512069958] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:06,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699169206] [2023-09-01 04:28:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:06,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-09-01 04:28:06,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:06,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-09-01 04:28:06,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:06,556 INFO L130 PetriNetUnfolder]: 1939/3219 cut-off events. [2023-09-01 04:28:06,556 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 04:28:06,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6072 conditions, 3219 events. 1939/3219 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17053 event pairs, 691 based on Foata normal form. 0/1761 useless extension candidates. Maximal degree in co-relation 6068. Up to 1717 conditions per place. [2023-09-01 04:28:06,583 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 63 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-09-01 04:28:06,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 293 flow [2023-09-01 04:28:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-09-01 04:28:06,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456475583864119 [2023-09-01 04:28:06,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-09-01 04:28:06,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-09-01 04:28:06,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:06,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-09-01 04:28:06,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,592 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 98 flow. Second operand 3 states and 514 transitions. [2023-09-01 04:28:06,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 293 flow [2023-09-01 04:28:06,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:06,593 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 119 flow [2023-09-01 04:28:06,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-09-01 04:28:06,595 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-09-01 04:28:06,595 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 119 flow [2023-09-01 04:28:06,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:06,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:28:06,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 04:28:06,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:06,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash 611864870, now seen corresponding path program 1 times [2023-09-01 04:28:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:06,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138980803] [2023-09-01 04:28:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:06,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:06,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:06,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138980803] [2023-09-01 04:28:06,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138980803] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:06,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:06,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:06,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162453160] [2023-09-01 04:28:06,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:06,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:06,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:06,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 314 [2023-09-01 04:28:06,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:06,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 314 [2023-09-01 04:28:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:06,865 INFO L130 PetriNetUnfolder]: 1865/3024 cut-off events. [2023-09-01 04:28:06,866 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-09-01 04:28:06,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6148 conditions, 3024 events. 1865/3024 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15523 event pairs, 1415 based on Foata normal form. 0/1831 useless extension candidates. Maximal degree in co-relation 6143. Up to 2694 conditions per place. [2023-09-01 04:28:06,878 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-09-01 04:28:06,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 189 flow [2023-09-01 04:28:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-09-01 04:28:06,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021231422505308 [2023-09-01 04:28:06,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-09-01 04:28:06,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-09-01 04:28:06,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:06,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-09-01 04:28:06,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,883 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 119 flow. Second operand 3 states and 473 transitions. [2023-09-01 04:28:06,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 189 flow [2023-09-01 04:28:06,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:06,885 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 114 flow [2023-09-01 04:28:06,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-09-01 04:28:06,886 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-09-01 04:28:06,886 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 114 flow [2023-09-01 04:28:06,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:06,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:06,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:28:06,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 04:28:06,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:06,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:06,887 INFO L85 PathProgramCache]: Analyzing trace with hash 611891360, now seen corresponding path program 1 times [2023-09-01 04:28:06,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:06,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504113007] [2023-09-01 04:28:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:06,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:06,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:06,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504113007] [2023-09-01 04:28:06,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504113007] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:06,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:06,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:28:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805848422] [2023-09-01 04:28:06,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:06,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:28:06,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:06,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:28:06,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:28:07,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 314 [2023-09-01 04:28:07,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:07,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 314 [2023-09-01 04:28:07,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:07,127 INFO L130 PetriNetUnfolder]: 1242/2048 cut-off events. [2023-09-01 04:28:07,127 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-09-01 04:28:07,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4138 conditions, 2048 events. 1242/2048 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10119 event pairs, 920 based on Foata normal form. 0/1298 useless extension candidates. Maximal degree in co-relation 4133. Up to 1825 conditions per place. [2023-09-01 04:28:07,153 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 34 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-09-01 04:28:07,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 184 flow [2023-09-01 04:28:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-09-01 04:28:07,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989384288747346 [2023-09-01 04:28:07,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-09-01 04:28:07,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-09-01 04:28:07,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:07,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-09-01 04:28:07,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,158 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 114 flow. Second operand 3 states and 470 transitions. [2023-09-01 04:28:07,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 184 flow [2023-09-01 04:28:07,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:07,161 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 112 flow [2023-09-01 04:28:07,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-09-01 04:28:07,163 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-09-01 04:28:07,163 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 112 flow [2023-09-01 04:28:07,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:07,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:28:07,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 04:28:07,164 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:07,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash 611891359, now seen corresponding path program 1 times [2023-09-01 04:28:07,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:07,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645467297] [2023-09-01 04:28:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:07,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:07,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:07,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645467297] [2023-09-01 04:28:07,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645467297] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:07,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:07,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:28:07,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170086506] [2023-09-01 04:28:07,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:07,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:28:07,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:28:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:28:07,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 314 [2023-09-01 04:28:07,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:07,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 314 [2023-09-01 04:28:07,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:07,339 INFO L130 PetriNetUnfolder]: 797/1369 cut-off events. [2023-09-01 04:28:07,339 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 04:28:07,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2770 conditions, 1369 events. 797/1369 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6487 event pairs, 575 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 2765. Up to 1210 conditions per place. [2023-09-01 04:28:07,344 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 33 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-09-01 04:28:07,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 180 flow [2023-09-01 04:28:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-09-01 04:28:07,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47876857749469215 [2023-09-01 04:28:07,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-09-01 04:28:07,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-09-01 04:28:07,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:07,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-09-01 04:28:07,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,348 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 112 flow. Second operand 3 states and 451 transitions. [2023-09-01 04:28:07,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 180 flow [2023-09-01 04:28:07,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:07,350 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 110 flow [2023-09-01 04:28:07,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-09-01 04:28:07,350 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -9 predicate places. [2023-09-01 04:28:07,350 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 110 flow [2023-09-01 04:28:07,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:07,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:28:07,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 04:28:07,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:07,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1787942298, now seen corresponding path program 1 times [2023-09-01 04:28:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:07,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289213905] [2023-09-01 04:28:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:07,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:07,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289213905] [2023-09-01 04:28:07,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289213905] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:07,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:07,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:28:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363110428] [2023-09-01 04:28:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:07,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-09-01 04:28:07,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:07,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-09-01 04:28:07,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:07,545 INFO L130 PetriNetUnfolder]: 653/1175 cut-off events. [2023-09-01 04:28:07,545 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-09-01 04:28:07,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1175 events. 653/1175 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5295 event pairs, 183 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 2346. Up to 699 conditions per place. [2023-09-01 04:28:07,550 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-09-01 04:28:07,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 263 flow [2023-09-01 04:28:07,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-09-01 04:28:07,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254777070063694 [2023-09-01 04:28:07,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-09-01 04:28:07,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-09-01 04:28:07,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:07,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-09-01 04:28:07,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,555 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 110 flow. Second operand 3 states and 495 transitions. [2023-09-01 04:28:07,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 263 flow [2023-09-01 04:28:07,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:07,556 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 110 flow [2023-09-01 04:28:07,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-09-01 04:28:07,557 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-09-01 04:28:07,557 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 110 flow [2023-09-01 04:28:07,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:07,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:07,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 04:28:07,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:07,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:07,558 INFO L85 PathProgramCache]: Analyzing trace with hash 224825544, now seen corresponding path program 1 times [2023-09-01 04:28:07,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:07,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882268497] [2023-09-01 04:28:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:07,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:07,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:07,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201638506] [2023-09-01 04:28:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:07,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:07,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:07,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:07,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 04:28:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:07,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:28:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:07,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:07,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:07,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882268497] [2023-09-01 04:28:07,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:07,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201638506] [2023-09-01 04:28:07,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201638506] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:07,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:07,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:28:07,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463746991] [2023-09-01 04:28:07,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:07,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:28:07,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:07,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:28:07,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:28:07,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 314 [2023-09-01 04:28:07,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:07,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 314 [2023-09-01 04:28:07,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:07,941 INFO L130 PetriNetUnfolder]: 699/1294 cut-off events. [2023-09-01 04:28:07,941 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-09-01 04:28:07,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2632 conditions, 1294 events. 699/1294 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6393 event pairs, 231 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 2626. Up to 537 conditions per place. [2023-09-01 04:28:07,946 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 61 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2023-09-01 04:28:07,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 76 transitions, 324 flow [2023-09-01 04:28:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:28:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:28:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-09-01 04:28:07,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063694267515924 [2023-09-01 04:28:07,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-09-01 04:28:07,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-09-01 04:28:07,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:07,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-09-01 04:28:07,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,952 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 110 flow. Second operand 4 states and 636 transitions. [2023-09-01 04:28:07,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 76 transitions, 324 flow [2023-09-01 04:28:07,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:07,954 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 140 flow [2023-09-01 04:28:07,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-09-01 04:28:07,954 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-09-01 04:28:07,955 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 140 flow [2023-09-01 04:28:07,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:07,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:07,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:07,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:08,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:08,166 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:08,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1384112314, now seen corresponding path program 1 times [2023-09-01 04:28:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:08,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76094062] [2023-09-01 04:28:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:08,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:08,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76094062] [2023-09-01 04:28:08,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76094062] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:08,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:08,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:28:08,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318692080] [2023-09-01 04:28:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:08,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:08,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-09-01 04:28:08,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:08,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-09-01 04:28:08,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:08,362 INFO L130 PetriNetUnfolder]: 886/1554 cut-off events. [2023-09-01 04:28:08,362 INFO L131 PetriNetUnfolder]: For 957/957 co-relation queries the response was YES. [2023-09-01 04:28:08,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 1554 events. 886/1554 cut-off events. For 957/957 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7191 event pairs, 361 based on Foata normal form. 0/1286 useless extension candidates. Maximal degree in co-relation 3727. Up to 908 conditions per place. [2023-09-01 04:28:08,367 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 60 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-09-01 04:28:08,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 353 flow [2023-09-01 04:28:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-09-01 04:28:08,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307855626326964 [2023-09-01 04:28:08,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-09-01 04:28:08,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-09-01 04:28:08,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:08,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-09-01 04:28:08,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,372 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 140 flow. Second operand 3 states and 500 transitions. [2023-09-01 04:28:08,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 353 flow [2023-09-01 04:28:08,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:08,376 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 151 flow [2023-09-01 04:28:08,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-09-01 04:28:08,377 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-09-01 04:28:08,377 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 151 flow [2023-09-01 04:28:08,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:08,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:08,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 04:28:08,378 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:08,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:08,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2056110489, now seen corresponding path program 1 times [2023-09-01 04:28:08,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:08,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731563644] [2023-09-01 04:28:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:08,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:08,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731563644] [2023-09-01 04:28:08,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731563644] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:08,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:28:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142231816] [2023-09-01 04:28:08,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:08,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:08,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:08,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:08,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:08,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-09-01 04:28:08,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:08,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-09-01 04:28:08,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:08,554 INFO L130 PetriNetUnfolder]: 965/1848 cut-off events. [2023-09-01 04:28:08,555 INFO L131 PetriNetUnfolder]: For 638/638 co-relation queries the response was YES. [2023-09-01 04:28:08,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 1848 events. 965/1848 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10047 event pairs, 430 based on Foata normal form. 0/1600 useless extension candidates. Maximal degree in co-relation 4297. Up to 1338 conditions per place. [2023-09-01 04:28:08,560 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 55 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-09-01 04:28:08,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 335 flow [2023-09-01 04:28:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-09-01 04:28:08,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529723991507431 [2023-09-01 04:28:08,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-09-01 04:28:08,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-09-01 04:28:08,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:08,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-09-01 04:28:08,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,565 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 151 flow. Second operand 3 states and 499 transitions. [2023-09-01 04:28:08,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 335 flow [2023-09-01 04:28:08,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:08,568 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 171 flow [2023-09-01 04:28:08,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-09-01 04:28:08,569 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-09-01 04:28:08,569 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 171 flow [2023-09-01 04:28:08,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:08,569 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:08,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 04:28:08,570 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:08,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1768746055, now seen corresponding path program 1 times [2023-09-01 04:28:08,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:08,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254104427] [2023-09-01 04:28:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:08,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:08,582 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369378873] [2023-09-01 04:28:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:08,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:08,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:08,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 04:28:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:08,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:28:08,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:08,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:28:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:08,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:08,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254104427] [2023-09-01 04:28:08,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:08,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369378873] [2023-09-01 04:28:08,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369378873] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:28:08,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:28:08,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-09-01 04:28:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282702190] [2023-09-01 04:28:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:08,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:28:08,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-09-01 04:28:08,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:08,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-09-01 04:28:08,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:08,821 INFO L130 PetriNetUnfolder]: 721/1327 cut-off events. [2023-09-01 04:28:08,821 INFO L131 PetriNetUnfolder]: For 814/814 co-relation queries the response was YES. [2023-09-01 04:28:08,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3192 conditions, 1327 events. 721/1327 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5921 event pairs, 249 based on Foata normal form. 114/1309 useless extension candidates. Maximal degree in co-relation 3182. Up to 744 conditions per place. [2023-09-01 04:28:08,826 INFO L137 encePairwiseOnDemand]: 308/314 looper letters, 55 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2023-09-01 04:28:08,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 339 flow [2023-09-01 04:28:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-09-01 04:28:08,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233545647558386 [2023-09-01 04:28:08,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-09-01 04:28:08,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-09-01 04:28:08,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:08,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-09-01 04:28:08,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,830 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 171 flow. Second operand 3 states and 493 transitions. [2023-09-01 04:28:08,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 339 flow [2023-09-01 04:28:08,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 328 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:08,833 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 177 flow [2023-09-01 04:28:08,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-09-01 04:28:08,833 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-09-01 04:28:08,833 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 177 flow [2023-09-01 04:28:08,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:08,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:08,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:08,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:09,038 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,SelfDestructingSolverStorable11 [2023-09-01 04:28:09,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:09,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1753815584, now seen corresponding path program 1 times [2023-09-01 04:28:09,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:09,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55597713] [2023-09-01 04:28:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:09,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:09,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:09,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757340952] [2023-09-01 04:28:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:09,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:09,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:09,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:09,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 04:28:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:09,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:28:09,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:09,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 04:28:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:09,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:09,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55597713] [2023-09-01 04:28:09,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757340952] [2023-09-01 04:28:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757340952] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:09,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:28:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604983209] [2023-09-01 04:28:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:09,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:09,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-09-01 04:28:09,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:09,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-09-01 04:28:09,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:09,286 INFO L130 PetriNetUnfolder]: 616/1181 cut-off events. [2023-09-01 04:28:09,286 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-09-01 04:28:09,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 1181 events. 616/1181 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5166 event pairs, 188 based on Foata normal form. 30/1123 useless extension candidates. Maximal degree in co-relation 2928. Up to 616 conditions per place. [2023-09-01 04:28:09,291 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 49 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-09-01 04:28:09,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 333 flow [2023-09-01 04:28:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-09-01 04:28:09,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148619957537155 [2023-09-01 04:28:09,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-09-01 04:28:09,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-09-01 04:28:09,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:09,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-09-01 04:28:09,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,296 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 177 flow. Second operand 3 states and 485 transitions. [2023-09-01 04:28:09,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 333 flow [2023-09-01 04:28:09,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:09,300 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 179 flow [2023-09-01 04:28:09,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-09-01 04:28:09,309 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-09-01 04:28:09,309 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 179 flow [2023-09-01 04:28:09,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:09,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:09,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:09,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:09,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:09,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 87621160, now seen corresponding path program 1 times [2023-09-01 04:28:09,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:09,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033184745] [2023-09-01 04:28:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:09,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:09,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:09,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033184745] [2023-09-01 04:28:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033184745] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:09,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:09,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:28:09,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116695733] [2023-09-01 04:28:09,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:09,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:09,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:09,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:09,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-09-01 04:28:09,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:09,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-09-01 04:28:09,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:09,694 INFO L130 PetriNetUnfolder]: 780/1564 cut-off events. [2023-09-01 04:28:09,694 INFO L131 PetriNetUnfolder]: For 965/977 co-relation queries the response was YES. [2023-09-01 04:28:09,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3950 conditions, 1564 events. 780/1564 cut-off events. For 965/977 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7874 event pairs, 351 based on Foata normal form. 34/1517 useless extension candidates. Maximal degree in co-relation 3939. Up to 935 conditions per place. [2023-09-01 04:28:09,702 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 64 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-09-01 04:28:09,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 435 flow [2023-09-01 04:28:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-09-01 04:28:09,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318471337579618 [2023-09-01 04:28:09,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-09-01 04:28:09,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-09-01 04:28:09,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:09,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-09-01 04:28:09,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,708 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 179 flow. Second operand 3 states and 501 transitions. [2023-09-01 04:28:09,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 435 flow [2023-09-01 04:28:09,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:09,711 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 187 flow [2023-09-01 04:28:09,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-09-01 04:28:09,711 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-09-01 04:28:09,712 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 187 flow [2023-09-01 04:28:09,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:09,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:09,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:09,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 04:28:09,712 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:09,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash 926893698, now seen corresponding path program 1 times [2023-09-01 04:28:09,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:09,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055476790] [2023-09-01 04:28:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:09,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:09,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:09,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457334776] [2023-09-01 04:28:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:09,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:09,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:09,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:09,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 04:28:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 04:28:09,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:28:09,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:28:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:28:09,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-09-01 04:28:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:09,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:09,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055476790] [2023-09-01 04:28:09,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457334776] [2023-09-01 04:28:09,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457334776] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:09,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:09,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:09,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853963519] [2023-09-01 04:28:09,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:10,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:10,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:10,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-09-01 04:28:10,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:10,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-09-01 04:28:10,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:10,213 INFO L130 PetriNetUnfolder]: 1169/2351 cut-off events. [2023-09-01 04:28:10,214 INFO L131 PetriNetUnfolder]: For 1822/1836 co-relation queries the response was YES. [2023-09-01 04:28:10,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 2351 events. 1169/2351 cut-off events. For 1822/1836 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13034 event pairs, 655 based on Foata normal form. 0/2233 useless extension candidates. Maximal degree in co-relation 6219. Up to 1260 conditions per place. [2023-09-01 04:28:10,222 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 65 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-09-01 04:28:10,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 438 flow [2023-09-01 04:28:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-09-01 04:28:10,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529723991507431 [2023-09-01 04:28:10,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-09-01 04:28:10,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-09-01 04:28:10,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:10,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-09-01 04:28:10,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,229 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 187 flow. Second operand 3 states and 499 transitions. [2023-09-01 04:28:10,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 438 flow [2023-09-01 04:28:10,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:10,234 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 197 flow [2023-09-01 04:28:10,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-09-01 04:28:10,234 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-09-01 04:28:10,234 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 197 flow [2023-09-01 04:28:10,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:10,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:10,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:10,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 04:28:10,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:10,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2002078106, now seen corresponding path program 1 times [2023-09-01 04:28:10,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:10,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607334532] [2023-09-01 04:28:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:10,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:10,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:10,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550600686] [2023-09-01 04:28:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:10,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:10,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:10,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:10,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 04:28:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:10,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:28:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:10,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607334532] [2023-09-01 04:28:10,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:10,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550600686] [2023-09-01 04:28:10,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550600686] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:10,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:10,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:28:10,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451938431] [2023-09-01 04:28:10,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:10,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:28:10,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:28:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:28:10,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 314 [2023-09-01 04:28:10,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:10,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 314 [2023-09-01 04:28:10,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:10,939 INFO L130 PetriNetUnfolder]: 837/1699 cut-off events. [2023-09-01 04:28:10,940 INFO L131 PetriNetUnfolder]: For 1244/1256 co-relation queries the response was YES. [2023-09-01 04:28:10,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4472 conditions, 1699 events. 837/1699 cut-off events. For 1244/1256 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8381 event pairs, 309 based on Foata normal form. 0/1645 useless extension candidates. Maximal degree in co-relation 4458. Up to 715 conditions per place. [2023-09-01 04:28:10,956 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 70 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-09-01 04:28:10,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 460 flow [2023-09-01 04:28:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:28:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:28:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-09-01 04:28:10,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015923566878981 [2023-09-01 04:28:10,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-09-01 04:28:10,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-09-01 04:28:10,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:10,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-09-01 04:28:10,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,962 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,962 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 197 flow. Second operand 4 states and 630 transitions. [2023-09-01 04:28:10,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 460 flow [2023-09-01 04:28:10,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:10,964 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 205 flow [2023-09-01 04:28:10,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-09-01 04:28:10,965 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2023-09-01 04:28:10,965 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 205 flow [2023-09-01 04:28:10,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:10,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:10,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:10,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 04:28:11,171 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,SelfDestructingSolverStorable15 [2023-09-01 04:28:11,171 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:11,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash -316564774, now seen corresponding path program 1 times [2023-09-01 04:28:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:11,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839780669] [2023-09-01 04:28:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:11,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:11,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437874254] [2023-09-01 04:28:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:11,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:11,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:11,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 04:28:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 04:28:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:28:11,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-09-01 04:28:11,395 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 04:28:11,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 04:28:11,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-09-01 04:28:11,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-09-01 04:28:11,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-09-01 04:28:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:11,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:11,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839780669] [2023-09-01 04:28:11,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437874254] [2023-09-01 04:28:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437874254] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:11,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:11,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 04:28:11,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957229600] [2023-09-01 04:28:11,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:28:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:28:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:28:11,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 314 [2023-09-01 04:28:11,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:11,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:11,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 314 [2023-09-01 04:28:11,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:12,282 INFO L130 PetriNetUnfolder]: 1290/2586 cut-off events. [2023-09-01 04:28:12,282 INFO L131 PetriNetUnfolder]: For 1932/1954 co-relation queries the response was YES. [2023-09-01 04:28:12,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6828 conditions, 2586 events. 1290/2586 cut-off events. For 1932/1954 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13347 event pairs, 524 based on Foata normal form. 4/2532 useless extension candidates. Maximal degree in co-relation 6813. Up to 787 conditions per place. [2023-09-01 04:28:12,292 INFO L137 encePairwiseOnDemand]: 304/314 looper letters, 107 selfloop transitions, 15 changer transitions 0/130 dead transitions. [2023-09-01 04:28:12,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 130 transitions, 746 flow [2023-09-01 04:28:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 04:28:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 04:28:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1313 transitions. [2023-09-01 04:28:12,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46461429582448693 [2023-09-01 04:28:12,296 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1313 transitions. [2023-09-01 04:28:12,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1313 transitions. [2023-09-01 04:28:12,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:12,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1313 transitions. [2023-09-01 04:28:12,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.88888888888889) internal successors, (1313), 9 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:12,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:12,302 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:12,302 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 205 flow. Second operand 9 states and 1313 transitions. [2023-09-01 04:28:12,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 130 transitions, 746 flow [2023-09-01 04:28:12,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 130 transitions, 738 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:28:12,306 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 301 flow [2023-09-01 04:28:12,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=301, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-09-01 04:28:12,307 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2023-09-01 04:28:12,307 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 301 flow [2023-09-01 04:28:12,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:12,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:12,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:12,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:12,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 04:28:12,513 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:12,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1119565154, now seen corresponding path program 1 times [2023-09-01 04:28:12,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:12,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707923429] [2023-09-01 04:28:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:12,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:12,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:12,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707923429] [2023-09-01 04:28:12,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707923429] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:28:12,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947788133] [2023-09-01 04:28:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:12,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:12,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:12,557 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:12,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 04:28:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:28:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:12,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:28:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947788133] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:28:12,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 04:28:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-09-01 04:28:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136208450] [2023-09-01 04:28:12,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 04:28:12,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:28:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:28:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:28:12,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-09-01 04:28:12,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 147.75) internal successors, (1182), 8 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:12,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:12,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-09-01 04:28:12,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:13,477 INFO L130 PetriNetUnfolder]: 3598/7236 cut-off events. [2023-09-01 04:28:13,477 INFO L131 PetriNetUnfolder]: For 7259/7329 co-relation queries the response was YES. [2023-09-01 04:28:13,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20014 conditions, 7236 events. 3598/7236 cut-off events. For 7259/7329 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 48851 event pairs, 242 based on Foata normal form. 652/7802 useless extension candidates. Maximal degree in co-relation 19994. Up to 1309 conditions per place. [2023-09-01 04:28:13,515 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 271 selfloop transitions, 47 changer transitions 0/329 dead transitions. [2023-09-01 04:28:13,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 329 transitions, 2363 flow [2023-09-01 04:28:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 04:28:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 04:28:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2573 transitions. [2023-09-01 04:28:13,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121417197452229 [2023-09-01 04:28:13,521 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2573 transitions. [2023-09-01 04:28:13,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2573 transitions. [2023-09-01 04:28:13,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:13,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2573 transitions. [2023-09-01 04:28:13,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 160.8125) internal successors, (2573), 16 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:13,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 314.0) internal successors, (5338), 17 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:13,543 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 314.0) internal successors, (5338), 17 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:13,543 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 301 flow. Second operand 16 states and 2573 transitions. [2023-09-01 04:28:13,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 329 transitions, 2363 flow [2023-09-01 04:28:13,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 329 transitions, 2334 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:13,558 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 758 flow [2023-09-01 04:28:13,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=758, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-09-01 04:28:13,559 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-09-01 04:28:13,559 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 758 flow [2023-09-01 04:28:13,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.75) internal successors, (1182), 8 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:13,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:13,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:13,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:13,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:13,765 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:13,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash 411249242, now seen corresponding path program 1 times [2023-09-01 04:28:13,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:13,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082493904] [2023-09-01 04:28:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:13,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:13,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185205123] [2023-09-01 04:28:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:13,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:13,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:13,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:13,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 04:28:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 04:28:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:13,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:28:13,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:28:13,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:28:13,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-09-01 04:28:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:14,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:28:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082493904] [2023-09-01 04:28:15,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185205123] [2023-09-01 04:28:15,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185205123] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:28:15,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:28:15,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:28:15,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293641694] [2023-09-01 04:28:15,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:28:15,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:28:15,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:28:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:28:15,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 314 [2023-09-01 04:28:15,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 758 flow. Second operand has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:15,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:15,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 314 [2023-09-01 04:28:15,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:16,115 INFO L130 PetriNetUnfolder]: 2852/5729 cut-off events. [2023-09-01 04:28:16,116 INFO L131 PetriNetUnfolder]: For 32252/32500 co-relation queries the response was YES. [2023-09-01 04:28:16,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23402 conditions, 5729 events. 2852/5729 cut-off events. For 32252/32500 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 35773 event pairs, 1335 based on Foata normal form. 246/5852 useless extension candidates. Maximal degree in co-relation 23369. Up to 2876 conditions per place. [2023-09-01 04:28:16,158 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 125 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-09-01 04:28:16,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 1360 flow [2023-09-01 04:28:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:28:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:28:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-09-01 04:28:16,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48089171974522293 [2023-09-01 04:28:16,160 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-09-01 04:28:16,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-09-01 04:28:16,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:16,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-09-01 04:28:16,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:16,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:16,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:16,164 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 758 flow. Second operand 4 states and 604 transitions. [2023-09-01 04:28:16,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 1360 flow [2023-09-01 04:28:16,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 136 transitions, 1263 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-09-01 04:28:16,219 INFO L231 Difference]: Finished difference. Result has 90 places, 90 transitions, 668 flow [2023-09-01 04:28:16,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=668, PETRI_PLACES=90, PETRI_TRANSITIONS=90} [2023-09-01 04:28:16,219 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2023-09-01 04:28:16,219 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 90 transitions, 668 flow [2023-09-01 04:28:16,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:16,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:16,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:16,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:16,433 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:16,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1418128194, now seen corresponding path program 1 times [2023-09-01 04:28:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:16,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509318180] [2023-09-01 04:28:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:16,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:16,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754390974] [2023-09-01 04:28:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:16,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:16,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:16,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 04:28:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:16,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:28:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:16,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:28:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:17,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509318180] [2023-09-01 04:28:17,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754390974] [2023-09-01 04:28:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754390974] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:28:17,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:28:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 04:28:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033696216] [2023-09-01 04:28:17,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:28:17,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:28:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:28:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:28:18,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 314 [2023-09-01 04:28:18,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 668 flow. Second operand has 12 states, 12 states have (on average 141.08333333333334) internal successors, (1693), 12 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:18,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:18,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 314 [2023-09-01 04:28:18,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:21,108 INFO L130 PetriNetUnfolder]: 3100/6440 cut-off events. [2023-09-01 04:28:21,108 INFO L131 PetriNetUnfolder]: For 34950/35126 co-relation queries the response was YES. [2023-09-01 04:28:21,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25609 conditions, 6440 events. 3100/6440 cut-off events. For 34950/35126 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 38762 event pairs, 838 based on Foata normal form. 78/6417 useless extension candidates. Maximal degree in co-relation 25577. Up to 1225 conditions per place. [2023-09-01 04:28:21,145 INFO L137 encePairwiseOnDemand]: 309/314 looper letters, 254 selfloop transitions, 11 changer transitions 0/275 dead transitions. [2023-09-01 04:28:21,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 275 transitions, 2543 flow [2023-09-01 04:28:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:28:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:28:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1504 transitions. [2023-09-01 04:28:21,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789808917197452 [2023-09-01 04:28:21,148 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1504 transitions. [2023-09-01 04:28:21,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1504 transitions. [2023-09-01 04:28:21,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:21,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1504 transitions. [2023-09-01 04:28:21,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.4) internal successors, (1504), 10 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:21,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:21,154 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:21,154 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 668 flow. Second operand 10 states and 1504 transitions. [2023-09-01 04:28:21,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 275 transitions, 2543 flow [2023-09-01 04:28:21,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 275 transitions, 2528 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:21,198 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 725 flow [2023-09-01 04:28:21,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=725, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2023-09-01 04:28:21,199 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 47 predicate places. [2023-09-01 04:28:21,199 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 725 flow [2023-09-01 04:28:21,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.08333333333334) internal successors, (1693), 12 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:21,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:21,200 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:21,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:21,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:21,407 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:21,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash 796499575, now seen corresponding path program 2 times [2023-09-01 04:28:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:21,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484144605] [2023-09-01 04:28:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:21,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-09-01 04:28:21,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:21,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484144605] [2023-09-01 04:28:21,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484144605] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:28:21,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983847951] [2023-09-01 04:28:21,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:28:21,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:21,488 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:21,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 04:28:21,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:28:21,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:28:21,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 04:28:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-09-01 04:28:21,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:21,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983847951] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:21,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:28:21,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 04:28:21,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193277001] [2023-09-01 04:28:21,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:21,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:28:21,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-09-01 04:28:21,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 725 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:21,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:21,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-09-01 04:28:21,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:22,515 INFO L130 PetriNetUnfolder]: 3054/6333 cut-off events. [2023-09-01 04:28:22,515 INFO L131 PetriNetUnfolder]: For 34887/35015 co-relation queries the response was YES. [2023-09-01 04:28:22,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25502 conditions, 6333 events. 3054/6333 cut-off events. For 34887/35015 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 38224 event pairs, 2154 based on Foata normal form. 27/6251 useless extension candidates. Maximal degree in co-relation 25468. Up to 5212 conditions per place. [2023-09-01 04:28:22,548 INFO L137 encePairwiseOnDemand]: 312/314 looper letters, 77 selfloop transitions, 1 changer transitions 6/94 dead transitions. [2023-09-01 04:28:22,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 884 flow [2023-09-01 04:28:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-09-01 04:28:22,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363057324840764 [2023-09-01 04:28:22,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-09-01 04:28:22,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-09-01 04:28:22,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:22,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-09-01 04:28:22,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:22,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:22,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:22,552 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 725 flow. Second operand 3 states and 465 transitions. [2023-09-01 04:28:22,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 884 flow [2023-09-01 04:28:22,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 94 transitions, 870 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-09-01 04:28:22,599 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 647 flow [2023-09-01 04:28:22,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=647, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2023-09-01 04:28:22,599 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2023-09-01 04:28:22,600 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 647 flow [2023-09-01 04:28:22,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:22,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:22,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:22,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-09-01 04:28:22,805 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,SelfDestructingSolverStorable20 [2023-09-01 04:28:22,805 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:28:22,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:22,806 INFO L85 PathProgramCache]: Analyzing trace with hash -25068098, now seen corresponding path program 1 times [2023-09-01 04:28:22,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:28:22,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987192117] [2023-09-01 04:28:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:22,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:28:22,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:28:22,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73300306] [2023-09-01 04:28:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:22,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:28:22,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:28:22,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:28:22,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 04:28:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:23,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 04:28:23,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:23,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 04:28:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:23,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:28:24,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-09-01 04:28:24,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 04:28:24,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-09-01 04:28:24,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 04:28:24,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 131 [2023-09-01 04:28:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:35,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:28:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987192117] [2023-09-01 04:28:35,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:28:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73300306] [2023-09-01 04:28:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73300306] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:28:35,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:28:35,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2023-09-01 04:28:35,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451084732] [2023-09-01 04:28:35,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:28:35,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 04:28:35,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:28:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 04:28:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2023-09-01 04:28:44,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-09-01 04:28:59,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 314 [2023-09-01 04:28:59,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 647 flow. Second operand has 27 states, 27 states have (on average 114.29629629629629) internal successors, (3086), 27 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:59,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:59,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 314 [2023-09-01 04:28:59,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:29:18,670 WARN L222 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 117 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:29:25,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-09-01 04:29:47,401 WARN L222 SmtUtils]: Spent 11.42s on a formula simplification. DAG size of input: 67 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:30:07,376 WARN L222 SmtUtils]: Spent 8.46s on a formula simplification. DAG size of input: 79 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:30:41,236 WARN L222 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 76 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:30:55,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-09-01 04:30:58,874 INFO L130 PetriNetUnfolder]: 7574/14480 cut-off events. [2023-09-01 04:30:58,876 INFO L131 PetriNetUnfolder]: For 79279/79327 co-relation queries the response was YES. [2023-09-01 04:30:58,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59377 conditions, 14480 events. 7574/14480 cut-off events. For 79279/79327 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 98172 event pairs, 915 based on Foata normal form. 30/14398 useless extension candidates. Maximal degree in co-relation 59344. Up to 2732 conditions per place. [2023-09-01 04:30:58,937 INFO L137 encePairwiseOnDemand]: 297/314 looper letters, 473 selfloop transitions, 214 changer transitions 125/816 dead transitions. [2023-09-01 04:30:58,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 816 transitions, 7385 flow [2023-09-01 04:30:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-09-01 04:30:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-09-01 04:30:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 8476 transitions. [2023-09-01 04:30:58,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38019197990490716 [2023-09-01 04:30:58,952 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 8476 transitions. [2023-09-01 04:30:58,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 8476 transitions. [2023-09-01 04:30:58,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:30:58,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 8476 transitions. [2023-09-01 04:30:58,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 119.38028169014085) internal successors, (8476), 71 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:30:58,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 314.0) internal successors, (22608), 72 states have internal predecessors, (22608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:30:58,991 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 314.0) internal successors, (22608), 72 states have internal predecessors, (22608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:30:58,991 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 647 flow. Second operand 71 states and 8476 transitions. [2023-09-01 04:30:58,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 816 transitions, 7385 flow [2023-09-01 04:30:59,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 816 transitions, 7380 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 04:30:59,157 INFO L231 Difference]: Finished difference. Result has 187 places, 283 transitions, 2916 flow [2023-09-01 04:30:59,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=2916, PETRI_PLACES=187, PETRI_TRANSITIONS=283} [2023-09-01 04:30:59,157 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 135 predicate places. [2023-09-01 04:30:59,158 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 283 transitions, 2916 flow [2023-09-01 04:30:59,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 114.29629629629629) internal successors, (3086), 27 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:30:59,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:30:59,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:30:59,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 04:30:59,364 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,SelfDestructingSolverStorable21 [2023-09-01 04:30:59,365 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:30:59,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:30:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1973238672, now seen corresponding path program 2 times [2023-09-01 04:30:59,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:30:59,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131067865] [2023-09-01 04:30:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:30:59,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:30:59,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:30:59,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223688591] [2023-09-01 04:30:59,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:30:59,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:30:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:30:59,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 04:30:59,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 04:31:00,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:31:00,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:31:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 04:31:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:31:00,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-09-01 04:31:01,526 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:31:01,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 04:31:01,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-09-01 04:31:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:31:01,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:31:02,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-09-01 04:31:02,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 04:31:02,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-09-01 04:31:02,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 04:31:02,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 131 [2023-09-01 04:32:32,858 WARN L222 SmtUtils]: Spent 57.38s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:33:47,336 WARN L222 SmtUtils]: Spent 11.69s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:33:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:33:51,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:33:51,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131067865] [2023-09-01 04:33:51,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:33:51,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223688591] [2023-09-01 04:33:51,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223688591] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:33:51,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:33:51,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 28 [2023-09-01 04:33:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032230084] [2023-09-01 04:33:51,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:33:51,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 04:33:51,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:33:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 04:33:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=750, Unknown=4, NotChecked=0, Total=870 [2023-09-01 04:33:54,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:33:57,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:00,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:03,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:06,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:10,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:12,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:15,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-09-01 04:34:17,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:20,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:22,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:24,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:27,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:30,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:33,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:36,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:39,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:46,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:49,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:52,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:57,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:34:59,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:02,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:05,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:08,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:10,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:13,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:15,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:19,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:20,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:22,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:25,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-09-01 04:35:26,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 314 [2023-09-01 04:35:26,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 283 transitions, 2916 flow. Second operand has 30 states, 30 states have (on average 94.86666666666666) internal successors, (2846), 30 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:35:26,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:35:26,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 314 [2023-09-01 04:35:26,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:36:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 04:36:35,404 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 139 [2023-09-01 04:36:35,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 04:36:35,600 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,SelfDestructingSolverStorable22 [2023-09-01 04:36:35,600 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:483) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfoldingHelper(PetriNetUnfolder.java:209) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfolding(PetriNetUnfolder.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:129) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:125) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 64 more [2023-09-01 04:36:35,605 INFO L158 Benchmark]: Toolchain (without parser) took 516452.34ms. Allocated memory was 79.7MB in the beginning and 658.5MB in the end (delta: 578.8MB). Free memory was 55.6MB in the beginning and 350.4MB in the end (delta: -294.8MB). Peak memory consumption was 285.7MB. Max. memory is 16.1GB. [2023-09-01 04:36:35,606 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory is still 38.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:36:35,606 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.94ms. Allocated memory is still 79.7MB. Free memory was 55.4MB in the beginning and 56.7MB in the end (delta: -1.4MB). Peak memory consumption was 26.3MB. Max. memory is 16.1GB. [2023-09-01 04:36:35,606 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.92ms. Allocated memory is still 79.7MB. Free memory was 56.7MB in the beginning and 54.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:36:35,606 INFO L158 Benchmark]: Boogie Preprocessor took 44.92ms. Allocated memory is still 79.7MB. Free memory was 54.2MB in the beginning and 52.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:36:35,606 INFO L158 Benchmark]: RCFGBuilder took 421.06ms. Allocated memory is still 79.7MB. Free memory was 52.5MB in the beginning and 33.3MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-09-01 04:36:35,606 INFO L158 Benchmark]: TraceAbstraction took 515555.55ms. Allocated memory was 79.7MB in the beginning and 658.5MB in the end (delta: 578.8MB). Free memory was 32.4MB in the beginning and 350.4MB in the end (delta: -318.1MB). Peak memory consumption was 259.4MB. Max. memory is 16.1GB. [2023-09-01 04:36:35,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory is still 38.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 372.94ms. Allocated memory is still 79.7MB. Free memory was 55.4MB in the beginning and 56.7MB in the end (delta: -1.4MB). Peak memory consumption was 26.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.92ms. Allocated memory is still 79.7MB. Free memory was 56.7MB in the beginning and 54.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.92ms. Allocated memory is still 79.7MB. Free memory was 54.2MB in the beginning and 52.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 421.06ms. Allocated memory is still 79.7MB. Free memory was 52.5MB in the beginning and 33.3MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 515555.55ms. Allocated memory was 79.7MB in the beginning and 658.5MB in the end (delta: 578.8MB). Free memory was 32.4MB in the beginning and 350.4MB in the end (delta: -318.1MB). Peak memory consumption was 259.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 154 PlacesBefore, 52 PlacesAfterwards, 158 TransitionsBefore, 52 TransitionsAfterwards, 5570 CoEnabledTransitionPairs, 7 FixpointIterations, 59 TrivialSequentialCompositions, 75 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 150 TotalNumberOfCompositions, 14674 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8169, independent: 7818, independent conditional: 0, independent unconditional: 7818, dependent: 351, dependent conditional: 0, dependent unconditional: 351, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3097, independent: 3048, independent conditional: 0, independent unconditional: 3048, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8169, independent: 4770, independent conditional: 0, independent unconditional: 4770, dependent: 302, dependent conditional: 0, dependent unconditional: 302, unknown: 3097, unknown conditional: 0, unknown unconditional: 3097] , Statistics on independence cache: Total cache size (in pairs): 337, Positive cache size: 314, Positive conditional cache size: 0, Positive unconditional cache size: 314, Negative cache size: 23, Negative conditional cache size: 0, Negative unconditional cache size: 23, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/pthread-deagle/circular_buffer_ok.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:36:37,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:36:37,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:36:37,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:36:37,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:36:37,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:36:37,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:36:37,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:36:37,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:36:37,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:36:37,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:36:37,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:36:37,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:36:37,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:36:37,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:36:37,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:36:37,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:36:37,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:36:37,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:36:37,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:36:37,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:36:37,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:36:37,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:36:37,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:36:37,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:36:37,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:36:37,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:36:37,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:36:37,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:36:37,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:36:37,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:36:37,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:36:37,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:36:37,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:36:37,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:36:37,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:36:37,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:36:37,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:36:37,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:36:37,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:36:37,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:36:37,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:36:37,158 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:36:37,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:36:37,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:36:37,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:36:37,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:36:37,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:36:37,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:36:37,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:36:37,161 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:36:37,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:36:37,162 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:36:37,162 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:36:37,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:36:37,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:36:37,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:36:37,162 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:36:37,162 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:36:37,163 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:36:37,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:36:37,163 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:36:37,163 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:36:37,163 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:36:37,163 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:36:37,163 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:36:37,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:36:37,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:36:37,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:36:37,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:36:37,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:36:37,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:36:37,165 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:36:37,165 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:36:37,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:36:37,165 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:36:37,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:36:37,165 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:36:37,166 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:36:37,166 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:36:37,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:36:37,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:36:37,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:36:37,415 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:36:37,415 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:36:37,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-09-01 04:36:38,361 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:36:38,586 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:36:38,587 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-09-01 04:36:38,598 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae3ca748f/b2ad776781214e5787190bb6ac9716ac/FLAG9031b39e7 [2023-09-01 04:36:38,610 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae3ca748f/b2ad776781214e5787190bb6ac9716ac [2023-09-01 04:36:38,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:36:38,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:36:38,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:36:38,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:36:38,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:36:38,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:36:38" (1/1) ... [2023-09-01 04:36:38,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6efabe19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:38, skipping insertion in model container [2023-09-01 04:36:38,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:36:38" (1/1) ... [2023-09-01 04:36:38,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:36:38,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:36:38,905 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-09-01 04:36:38,909 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-09-01 04:36:38,915 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-09-01 04:36:38,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:36:38,936 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:36:38,972 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-09-01 04:36:38,974 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-09-01 04:36:38,977 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-09-01 04:36:38,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:36:39,026 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:36:39,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39 WrapperNode [2023-09-01 04:36:39,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:36:39,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:36:39,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:36:39,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:36:39,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,110 INFO L138 Inliner]: procedures = 175, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 141 [2023-09-01 04:36:39,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:36:39,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:36:39,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:36:39,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:36:39,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,140 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:36:39,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:36:39,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:36:39,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:36:39,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (1/1) ... [2023-09-01 04:36:39,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:36:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:36:39,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 04:36:39,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 04:36:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-09-01 04:36:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:36:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 04:36:39,207 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 04:36:39,208 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-09-01 04:36:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:36:39,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:36:39,209 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:36:39,321 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:36:39,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:36:39,675 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:36:39,680 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:36:39,681 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 04:36:39,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:36:39 BoogieIcfgContainer [2023-09-01 04:36:39,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:36:39,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:36:39,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:36:39,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:36:39,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:36:38" (1/3) ... [2023-09-01 04:36:39,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41baa1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:36:39, skipping insertion in model container [2023-09-01 04:36:39,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:36:39" (2/3) ... [2023-09-01 04:36:39,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41baa1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:36:39, skipping insertion in model container [2023-09-01 04:36:39,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:36:39" (3/3) ... [2023-09-01 04:36:39,687 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-09-01 04:36:39,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:36:39,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 04:36:39,713 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:36:39,810 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:36:39,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 163 transitions, 342 flow [2023-09-01 04:36:39,879 INFO L130 PetriNetUnfolder]: 11/161 cut-off events. [2023-09-01 04:36:39,879 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:36:39,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 11/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 348 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-09-01 04:36:39,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 163 transitions, 342 flow [2023-09-01 04:36:39,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 157 transitions, 326 flow [2023-09-01 04:36:39,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:36:39,900 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 157 transitions, 326 flow [2023-09-01 04:36:39,902 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 157 transitions, 326 flow [2023-09-01 04:36:39,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 157 transitions, 326 flow [2023-09-01 04:36:39,928 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2023-09-01 04:36:39,930 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:36:39,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 11/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 346 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-09-01 04:36:39,936 INFO L119 LiptonReduction]: Number of co-enabled transitions 5356 [2023-09-01 04:37:40,278 INFO L134 LiptonReduction]: Checked pairs total: 14552 [2023-09-01 04:37:40,278 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-09-01 04:37:40,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:37:40,297 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;@25d44268, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:37:40,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-09-01 04:37:40,298 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 04:37:40,301 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:37:40,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:40,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 04:37:40,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:40,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash 639, now seen corresponding path program 1 times [2023-09-01 04:37:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:40,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045938661] [2023-09-01 04:37:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:40,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:40,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:40,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:40,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 04:37:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:40,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-09-01 04:37:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:40,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:40,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:40,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045938661] [2023-09-01 04:37:40,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045938661] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:40,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:40,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 04:37:40,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851188213] [2023-09-01 04:37:40,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:40,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 04:37:40,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 04:37:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 04:37:40,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 309 [2023-09-01 04:37:40,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 151.5) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:40,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:40,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 309 [2023-09-01 04:37:40,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:40,733 INFO L130 PetriNetUnfolder]: 1409/2292 cut-off events. [2023-09-01 04:37:40,734 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2023-09-01 04:37:40,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4415 conditions, 2292 events. 1409/2292 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12083 event pairs, 1085 based on Foata normal form. 52/1244 useless extension candidates. Maximal degree in co-relation 4163. Up to 2080 conditions per place. [2023-09-01 04:37:40,745 INFO L137 encePairwiseOnDemand]: 306/309 looper letters, 42 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-09-01 04:37:40,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 194 flow [2023-09-01 04:37:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 04:37:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 04:37:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 347 transitions. [2023-09-01 04:37:40,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614886731391586 [2023-09-01 04:37:40,762 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 347 transitions. [2023-09-01 04:37:40,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 347 transitions. [2023-09-01 04:37:40,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:40,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 347 transitions. [2023-09-01 04:37:40,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 173.5) internal successors, (347), 2 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:40,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:40,776 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:40,777 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 116 flow. Second operand 2 states and 347 transitions. [2023-09-01 04:37:40,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 194 flow [2023-09-01 04:37:40,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:37:40,781 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 102 flow [2023-09-01 04:37:40,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2023-09-01 04:37:40,785 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-09-01 04:37:40,785 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 102 flow [2023-09-01 04:37:40,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 151.5) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:40,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:37:40,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:40,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:40,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash 629854, now seen corresponding path program 1 times [2023-09-01 04:37:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:40,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806486779] [2023-09-01 04:37:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:40,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:40,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:40,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:41,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 04:37:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:41,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:37:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:41,157 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 04:37:41,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-09-01 04:37:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:41,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:41,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:41,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806486779] [2023-09-01 04:37:41,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806486779] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:41,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:41,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:37:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830451003] [2023-09-01 04:37:41,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:41,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:41,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:41,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:41,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 309 [2023-09-01 04:37:41,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:41,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:41,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 309 [2023-09-01 04:37:41,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:41,472 INFO L130 PetriNetUnfolder]: 1380/2234 cut-off events. [2023-09-01 04:37:41,472 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:37:41,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4277 conditions, 2234 events. 1380/2234 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 11656 event pairs, 1062 based on Foata normal form. 0/1172 useless extension candidates. Maximal degree in co-relation 4274. Up to 2026 conditions per place. [2023-09-01 04:37:41,479 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 38 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-09-01 04:37:41,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 178 flow [2023-09-01 04:37:41,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-09-01 04:37:41,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517799352750809 [2023-09-01 04:37:41,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-09-01 04:37:41,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-09-01 04:37:41,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:41,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-09-01 04:37:41,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:41,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:41,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:41,484 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 102 flow. Second operand 3 states and 480 transitions. [2023-09-01 04:37:41,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 178 flow [2023-09-01 04:37:41,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 04:37:41,485 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 102 flow [2023-09-01 04:37:41,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-09-01 04:37:41,486 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-09-01 04:37:41,486 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 102 flow [2023-09-01 04:37:41,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:41,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:41,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:37:41,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:41,694 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:41,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash 629855, now seen corresponding path program 1 times [2023-09-01 04:37:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:41,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770765420] [2023-09-01 04:37:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:41,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:41,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:41,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:41,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 04:37:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:41,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:37:41,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:41,768 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 04:37:41,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2023-09-01 04:37:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:41,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:41,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:41,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770765420] [2023-09-01 04:37:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770765420] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:41,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:41,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:37:41,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170337886] [2023-09-01 04:37:41,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:41,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:41,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:41,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 309 [2023-09-01 04:37:41,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:41,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:41,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 309 [2023-09-01 04:37:41,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:42,227 INFO L130 PetriNetUnfolder]: 1351/2176 cut-off events. [2023-09-01 04:37:42,227 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:37:42,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4170 conditions, 2176 events. 1351/2176 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 11271 event pairs, 1039 based on Foata normal form. 0/1152 useless extension candidates. Maximal degree in co-relation 4166. Up to 1974 conditions per place. [2023-09-01 04:37:42,234 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-09-01 04:37:42,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 174 flow [2023-09-01 04:37:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-09-01 04:37:42,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026968716289104 [2023-09-01 04:37:42,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-09-01 04:37:42,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-09-01 04:37:42,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:42,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-09-01 04:37:42,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,239 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 102 flow. Second operand 3 states and 466 transitions. [2023-09-01 04:37:42,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 174 flow [2023-09-01 04:37:42,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:37:42,243 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 98 flow [2023-09-01 04:37:42,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-09-01 04:37:42,244 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-09-01 04:37:42,244 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 98 flow [2023-09-01 04:37:42,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:42,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:37:42,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:42,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:42,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:42,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash 605303593, now seen corresponding path program 1 times [2023-09-01 04:37:42,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:42,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606067528] [2023-09-01 04:37:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:42,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:42,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:42,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:42,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 04:37:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:42,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:37:42,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:42,531 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 04:37:42,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-09-01 04:37:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:42,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:42,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606067528] [2023-09-01 04:37:42,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606067528] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:42,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:42,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:37:42,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922744287] [2023-09-01 04:37:42,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:42,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:42,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:42,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:42,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:42,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 309 [2023-09-01 04:37:42,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:42,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 309 [2023-09-01 04:37:42,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:42,796 INFO L130 PetriNetUnfolder]: 989/1623 cut-off events. [2023-09-01 04:37:42,796 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:37:42,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3111 conditions, 1623 events. 989/1623 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8131 event pairs, 752 based on Foata normal form. 0/926 useless extension candidates. Maximal degree in co-relation 3107. Up to 1468 conditions per place. [2023-09-01 04:37:42,801 INFO L137 encePairwiseOnDemand]: 306/309 looper letters, 35 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-09-01 04:37:42,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 170 flow [2023-09-01 04:37:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-09-01 04:37:42,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5134843581445523 [2023-09-01 04:37:42,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-09-01 04:37:42,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-09-01 04:37:42,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:42,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-09-01 04:37:42,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,805 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 98 flow. Second operand 3 states and 476 transitions. [2023-09-01 04:37:42,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 170 flow [2023-09-01 04:37:42,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:37:42,806 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 96 flow [2023-09-01 04:37:42,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-09-01 04:37:42,806 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-09-01 04:37:42,807 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 96 flow [2023-09-01 04:37:42,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:42,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:42,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:37:42,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:43,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:43,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:43,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:43,014 INFO L85 PathProgramCache]: Analyzing trace with hash 605303592, now seen corresponding path program 1 times [2023-09-01 04:37:43,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:43,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279056319] [2023-09-01 04:37:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:43,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:43,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:43,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:43,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 04:37:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:43,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:37:43,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:43,097 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 04:37:43,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-09-01 04:37:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:43,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:43,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:43,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279056319] [2023-09-01 04:37:43,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279056319] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:43,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:43,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:37:43,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719799174] [2023-09-01 04:37:43,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:43,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:43,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:43,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 309 [2023-09-01 04:37:43,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:43,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 309 [2023-09-01 04:37:43,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:43,366 INFO L130 PetriNetUnfolder]: 627/1070 cut-off events. [2023-09-01 04:37:43,366 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:37:43,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2052 conditions, 1070 events. 627/1070 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5142 event pairs, 465 based on Foata normal form. 0/700 useless extension candidates. Maximal degree in co-relation 2048. Up to 962 conditions per place. [2023-09-01 04:37:43,371 INFO L137 encePairwiseOnDemand]: 306/309 looper letters, 34 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-09-01 04:37:43,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 166 flow [2023-09-01 04:37:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-09-01 04:37:43,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4994606256742179 [2023-09-01 04:37:43,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-09-01 04:37:43,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-09-01 04:37:43,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:43,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-09-01 04:37:43,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,377 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 96 flow. Second operand 3 states and 463 transitions. [2023-09-01 04:37:43,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 166 flow [2023-09-01 04:37:43,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:37:43,378 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 94 flow [2023-09-01 04:37:43,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-09-01 04:37:43,379 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -9 predicate places. [2023-09-01 04:37:43,379 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 94 flow [2023-09-01 04:37:43,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:43,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:37:43,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:43,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:43,583 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:43,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash 605276953, now seen corresponding path program 1 times [2023-09-01 04:37:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:43,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972526110] [2023-09-01 04:37:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:43,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:43,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:43,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:43,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 04:37:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:37:43,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:43,681 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2023-09-01 04:37:43,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2023-09-01 04:37:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:43,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:43,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:43,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972526110] [2023-09-01 04:37:43,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972526110] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:43,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:43,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:37:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242133083] [2023-09-01 04:37:43,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:43,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 309 [2023-09-01 04:37:43,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:43,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 309 [2023-09-01 04:37:43,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:43,929 INFO L130 PetriNetUnfolder]: 543/930 cut-off events. [2023-09-01 04:37:43,929 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 04:37:43,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 930 events. 543/930 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4288 event pairs, 393 based on Foata normal form. 0/638 useless extension candidates. Maximal degree in co-relation 1773. Up to 828 conditions per place. [2023-09-01 04:37:43,932 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 32 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-09-01 04:37:43,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 158 flow [2023-09-01 04:37:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-09-01 04:37:43,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145631067961165 [2023-09-01 04:37:43,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-09-01 04:37:43,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-09-01 04:37:43,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:43,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-09-01 04:37:43,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,937 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 94 flow. Second operand 3 states and 477 transitions. [2023-09-01 04:37:43,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 158 flow [2023-09-01 04:37:43,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:37:43,938 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 90 flow [2023-09-01 04:37:43,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-09-01 04:37:43,939 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -11 predicate places. [2023-09-01 04:37:43,939 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 90 flow [2023-09-01 04:37:43,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:43,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:43,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:37:43,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:44,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:44,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:44,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash 605276955, now seen corresponding path program 1 times [2023-09-01 04:37:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:44,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339108531] [2023-09-01 04:37:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:44,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:44,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:44,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:44,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 04:37:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:44,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:37:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:44,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:37:44,250 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 04:37:44,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2023-09-01 04:37:44,264 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:37:44,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 04:37:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:44,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:44,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:44,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339108531] [2023-09-01 04:37:44,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339108531] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:44,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:44,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:37:44,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237861252] [2023-09-01 04:37:44,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:44,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:44,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:44,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 309 [2023-09-01 04:37:44,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:44,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:44,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 309 [2023-09-01 04:37:44,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:44,879 INFO L130 PetriNetUnfolder]: 873/1522 cut-off events. [2023-09-01 04:37:44,879 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 04:37:44,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2884 conditions, 1522 events. 873/1522 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 7183 event pairs, 303 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 2880. Up to 787 conditions per place. [2023-09-01 04:37:44,883 INFO L137 encePairwiseOnDemand]: 303/309 looper letters, 58 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-09-01 04:37:44,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 271 flow [2023-09-01 04:37:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-09-01 04:37:44,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480043149946062 [2023-09-01 04:37:44,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-09-01 04:37:44,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-09-01 04:37:44,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:44,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-09-01 04:37:44,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:44,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:44,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:44,888 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 90 flow. Second operand 3 states and 508 transitions. [2023-09-01 04:37:44,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 271 flow [2023-09-01 04:37:44,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:37:44,889 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 109 flow [2023-09-01 04:37:44,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-09-01 04:37:44,890 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2023-09-01 04:37:44,890 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 109 flow [2023-09-01 04:37:44,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:44,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:44,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:37:44,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:45,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:45,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:45,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1583716956, now seen corresponding path program 1 times [2023-09-01 04:37:45,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:45,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971965732] [2023-09-01 04:37:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:45,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:45,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:45,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:45,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 04:37:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:37:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:45,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:45,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:45,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971965732] [2023-09-01 04:37:45,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971965732] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:45,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:45,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:37:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813896105] [2023-09-01 04:37:45,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:45,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:45,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:45,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 309 [2023-09-01 04:37:45,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:45,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:45,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 309 [2023-09-01 04:37:45,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:45,564 INFO L130 PetriNetUnfolder]: 727/1274 cut-off events. [2023-09-01 04:37:45,564 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-09-01 04:37:45,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2595 conditions, 1274 events. 727/1274 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5638 event pairs, 217 based on Foata normal form. 0/972 useless extension candidates. Maximal degree in co-relation 2590. Up to 765 conditions per place. [2023-09-01 04:37:45,569 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 55 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-09-01 04:37:45,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 64 transitions, 265 flow [2023-09-01 04:37:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:45,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-09-01 04:37:45,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329018338727076 [2023-09-01 04:37:45,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-09-01 04:37:45,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-09-01 04:37:45,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:45,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-09-01 04:37:45,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:45,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:45,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:45,574 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 109 flow. Second operand 3 states and 494 transitions. [2023-09-01 04:37:45,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 64 transitions, 265 flow [2023-09-01 04:37:45,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:37:45,576 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 110 flow [2023-09-01 04:37:45,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-09-01 04:37:45,576 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-09-01 04:37:45,576 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 110 flow [2023-09-01 04:37:45,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:45,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:45,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:45,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-09-01 04:37:45,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:45,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:45,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1532391677, now seen corresponding path program 1 times [2023-09-01 04:37:45,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:45,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042499815] [2023-09-01 04:37:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:45,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:45,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:45,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:45,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 04:37:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:45,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:37:45,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:45,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:45,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:45,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042499815] [2023-09-01 04:37:45,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042499815] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:45,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:45,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 04:37:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963754935] [2023-09-01 04:37:45,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:45,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:37:45,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:37:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:37:46,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 309 [2023-09-01 04:37:46,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 140.33333333333334) internal successors, (842), 6 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:46,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 309 [2023-09-01 04:37:46,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:46,387 INFO L130 PetriNetUnfolder]: 953/1782 cut-off events. [2023-09-01 04:37:46,388 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-09-01 04:37:46,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3605 conditions, 1782 events. 953/1782 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9774 event pairs, 523 based on Foata normal form. 0/1452 useless extension candidates. Maximal degree in co-relation 3599. Up to 1161 conditions per place. [2023-09-01 04:37:46,394 INFO L137 encePairwiseOnDemand]: 301/309 looper letters, 93 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2023-09-01 04:37:46,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 107 transitions, 457 flow [2023-09-01 04:37:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:37:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:37:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2023-09-01 04:37:46,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043149946062567 [2023-09-01 04:37:46,397 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2023-09-01 04:37:46,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2023-09-01 04:37:46,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:46,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2023-09-01 04:37:46,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,402 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,402 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 110 flow. Second operand 6 states and 935 transitions. [2023-09-01 04:37:46,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 107 transitions, 457 flow [2023-09-01 04:37:46,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 107 transitions, 451 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:37:46,406 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 160 flow [2023-09-01 04:37:46,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-09-01 04:37:46,407 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-09-01 04:37:46,407 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 160 flow [2023-09-01 04:37:46,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 140.33333333333334) internal successors, (842), 6 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:46,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:46,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:46,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:46,616 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:46,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash -900176101, now seen corresponding path program 1 times [2023-09-01 04:37:46,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:46,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733383959] [2023-09-01 04:37:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:46,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:46,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:46,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:46,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 04:37:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 04:37:46,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:46,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:46,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:46,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733383959] [2023-09-01 04:37:46,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733383959] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:46,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:46,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:37:46,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75947369] [2023-09-01 04:37:46,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:46,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:46,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:46,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:46,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 309 [2023-09-01 04:37:46,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:46,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 309 [2023-09-01 04:37:46,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:46,943 INFO L130 PetriNetUnfolder]: 1014/1775 cut-off events. [2023-09-01 04:37:46,943 INFO L131 PetriNetUnfolder]: For 396/396 co-relation queries the response was YES. [2023-09-01 04:37:46,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4215 conditions, 1775 events. 1014/1775 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8572 event pairs, 461 based on Foata normal form. 0/1497 useless extension candidates. Maximal degree in co-relation 4205. Up to 908 conditions per place. [2023-09-01 04:37:46,949 INFO L137 encePairwiseOnDemand]: 304/309 looper letters, 64 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-09-01 04:37:46,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 372 flow [2023-09-01 04:37:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-09-01 04:37:46,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535059331175836 [2023-09-01 04:37:46,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-09-01 04:37:46,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-09-01 04:37:46,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:46,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-09-01 04:37:46,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,954 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 160 flow. Second operand 3 states and 496 transitions. [2023-09-01 04:37:46,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 372 flow [2023-09-01 04:37:46,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 04:37:46,956 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 186 flow [2023-09-01 04:37:46,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-09-01 04:37:46,956 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-09-01 04:37:46,957 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 186 flow [2023-09-01 04:37:46,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:46,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:46,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:46,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:47,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:47,164 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:47,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:47,164 INFO L85 PathProgramCache]: Analyzing trace with hash -611198786, now seen corresponding path program 1 times [2023-09-01 04:37:47,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:47,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900191217] [2023-09-01 04:37:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:47,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:47,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:47,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:47,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 04:37:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 04:37:47,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:47,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:47,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:47,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900191217] [2023-09-01 04:37:47,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900191217] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:47,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:47,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:37:47,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279308068] [2023-09-01 04:37:47,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:47,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:47,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:47,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:47,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:47,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 309 [2023-09-01 04:37:47,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:47,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:47,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 309 [2023-09-01 04:37:47,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:47,572 INFO L130 PetriNetUnfolder]: 1633/2781 cut-off events. [2023-09-01 04:37:47,573 INFO L131 PetriNetUnfolder]: For 834/834 co-relation queries the response was YES. [2023-09-01 04:37:47,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6837 conditions, 2781 events. 1633/2781 cut-off events. For 834/834 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 13286 event pairs, 778 based on Foata normal form. 44/2398 useless extension candidates. Maximal degree in co-relation 6825. Up to 1308 conditions per place. [2023-09-01 04:37:47,580 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 75 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-09-01 04:37:47,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 438 flow [2023-09-01 04:37:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-09-01 04:37:47,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490830636461704 [2023-09-01 04:37:47,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-09-01 04:37:47,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-09-01 04:37:47,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:47,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-09-01 04:37:47,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:47,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:47,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:47,586 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 186 flow. Second operand 3 states and 509 transitions. [2023-09-01 04:37:47,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 438 flow [2023-09-01 04:37:47,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 423 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:37:47,590 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 184 flow [2023-09-01 04:37:47,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-09-01 04:37:47,590 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-09-01 04:37:47,591 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 184 flow [2023-09-01 04:37:47,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:47,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:47,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:47,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:47,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:47,800 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:47,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2125281803, now seen corresponding path program 1 times [2023-09-01 04:37:47,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:47,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206127951] [2023-09-01 04:37:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:47,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:47,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:47,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:47,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 04:37:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 04:37:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:47,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:47,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206127951] [2023-09-01 04:37:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206127951] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:47,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:47,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:37:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465267123] [2023-09-01 04:37:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:47,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:47,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 309 [2023-09-01 04:37:47,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:47,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:47,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 309 [2023-09-01 04:37:47,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:48,191 INFO L130 PetriNetUnfolder]: 600/1084 cut-off events. [2023-09-01 04:37:48,191 INFO L131 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2023-09-01 04:37:48,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2653 conditions, 1084 events. 600/1084 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4762 event pairs, 300 based on Foata normal form. 102/1051 useless extension candidates. Maximal degree in co-relation 2641. Up to 534 conditions per place. [2023-09-01 04:37:48,195 INFO L137 encePairwiseOnDemand]: 304/309 looper letters, 56 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-09-01 04:37:48,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 333 flow [2023-09-01 04:37:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-09-01 04:37:48,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285868392664509 [2023-09-01 04:37:48,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-09-01 04:37:48,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-09-01 04:37:48,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:48,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-09-01 04:37:48,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:48,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:48,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:48,200 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 184 flow. Second operand 3 states and 490 transitions. [2023-09-01 04:37:48,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 333 flow [2023-09-01 04:37:48,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 320 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 04:37:48,202 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 169 flow [2023-09-01 04:37:48,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-09-01 04:37:48,203 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-09-01 04:37:48,203 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 169 flow [2023-09-01 04:37:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:48,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:48,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:48,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:48,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:48,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:48,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1950725224, now seen corresponding path program 1 times [2023-09-01 04:37:48,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:48,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635918238] [2023-09-01 04:37:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:48,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:48,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:48,414 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:48,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 04:37:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:37:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:48,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-09-01 04:37:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:48,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:48,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:48,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635918238] [2023-09-01 04:37:48,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635918238] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:48,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:48,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:37:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048032084] [2023-09-01 04:37:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:48,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:37:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:48,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:37:48,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:37:48,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 309 [2023-09-01 04:37:48,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:48,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:48,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 309 [2023-09-01 04:37:48,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:50,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:37:50,719 INFO L130 PetriNetUnfolder]: 466/885 cut-off events. [2023-09-01 04:37:50,719 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2023-09-01 04:37:50,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2164 conditions, 885 events. 466/885 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3779 event pairs, 125 based on Foata normal form. 24/823 useless extension candidates. Maximal degree in co-relation 2151. Up to 521 conditions per place. [2023-09-01 04:37:50,722 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 49 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-09-01 04:37:50,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 310 flow [2023-09-01 04:37:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:37:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:37:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-09-01 04:37:50,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210355987055016 [2023-09-01 04:37:50,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-09-01 04:37:50,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-09-01 04:37:50,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:50,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-09-01 04:37:50,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:50,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:50,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:50,730 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 169 flow. Second operand 3 states and 483 transitions. [2023-09-01 04:37:50,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 310 flow [2023-09-01 04:37:50,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:37:50,732 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 173 flow [2023-09-01 04:37:50,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-09-01 04:37:50,733 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-09-01 04:37:50,733 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 173 flow [2023-09-01 04:37:50,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:50,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:50,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:50,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:50,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:50,937 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:50,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:50,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2125160518, now seen corresponding path program 1 times [2023-09-01 04:37:50,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:50,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893194379] [2023-09-01 04:37:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:50,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:50,939 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:50,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 04:37:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:51,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:37:51,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:51,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:51,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:51,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893194379] [2023-09-01 04:37:51,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893194379] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:51,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:51,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:37:51,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494130938] [2023-09-01 04:37:51,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:51,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:37:51,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:37:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:37:51,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 309 [2023-09-01 04:37:51,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:51,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:51,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 309 [2023-09-01 04:37:51,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:53,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:37:53,546 INFO L130 PetriNetUnfolder]: 670/1341 cut-off events. [2023-09-01 04:37:53,546 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2023-09-01 04:37:53,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 1341 events. 670/1341 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6121 event pairs, 265 based on Foata normal form. 0/1253 useless extension candidates. Maximal degree in co-relation 3305. Up to 569 conditions per place. [2023-09-01 04:37:53,549 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 73 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-09-01 04:37:53,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 83 transitions, 446 flow [2023-09-01 04:37:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:37:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:37:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-09-01 04:37:53,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517799352750809 [2023-09-01 04:37:53,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-09-01 04:37:53,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-09-01 04:37:53,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:53,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-09-01 04:37:53,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:53,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:53,555 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:53,555 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 173 flow. Second operand 4 states and 640 transitions. [2023-09-01 04:37:53,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 83 transitions, 446 flow [2023-09-01 04:37:53,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 438 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:37:53,557 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 183 flow [2023-09-01 04:37:53,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-09-01 04:37:53,557 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 6 predicate places. [2023-09-01 04:37:53,558 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 183 flow [2023-09-01 04:37:53,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:53,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:53,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:53,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:53,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:53,765 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:53,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 414988379, now seen corresponding path program 1 times [2023-09-01 04:37:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:53,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229847761] [2023-09-01 04:37:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:53,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:53,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:53,766 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:53,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 04:37:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:37:53,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:53,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:53,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:53,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229847761] [2023-09-01 04:37:53,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229847761] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:53,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:53,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:37:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129849456] [2023-09-01 04:37:53,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:53,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:37:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:37:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:37:54,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 309 [2023-09-01 04:37:54,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:54,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:54,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 309 [2023-09-01 04:37:54,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:54,745 INFO L130 PetriNetUnfolder]: 520/1045 cut-off events. [2023-09-01 04:37:54,745 INFO L131 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2023-09-01 04:37:54,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2553 conditions, 1045 events. 520/1045 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4282 event pairs, 197 based on Foata normal form. 0/997 useless extension candidates. Maximal degree in co-relation 2538. Up to 481 conditions per place. [2023-09-01 04:37:54,748 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 62 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-09-01 04:37:54,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 384 flow [2023-09-01 04:37:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:37:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:37:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 622 transitions. [2023-09-01 04:37:54,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032362459546925 [2023-09-01 04:37:54,751 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 622 transitions. [2023-09-01 04:37:54,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 622 transitions. [2023-09-01 04:37:54,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:54,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 622 transitions. [2023-09-01 04:37:54,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:54,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:54,754 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:54,754 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 183 flow. Second operand 4 states and 622 transitions. [2023-09-01 04:37:54,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 384 flow [2023-09-01 04:37:54,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:37:54,756 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 189 flow [2023-09-01 04:37:54,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2023-09-01 04:37:54,756 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2023-09-01 04:37:54,757 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 189 flow [2023-09-01 04:37:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:54,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:54,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:54,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:54,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:54,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:54,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash -20275269, now seen corresponding path program 1 times [2023-09-01 04:37:54,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637163012] [2023-09-01 04:37:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:37:54,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:54,967 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:54,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 04:37:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:37:55,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:37:55,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:55,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-09-01 04:37:55,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-09-01 04:37:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:55,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:55,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637163012] [2023-09-01 04:37:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637163012] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:55,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 04:37:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428877735] [2023-09-01 04:37:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 04:37:55,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 04:37:55,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:37:55,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 309 [2023-09-01 04:37:55,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 189 flow. Second operand has 9 states, 9 states have (on average 124.77777777777777) internal successors, (1123), 9 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:55,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:37:55,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 309 [2023-09-01 04:37:55,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:37:57,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 04:37:58,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:37:58,665 INFO L130 PetriNetUnfolder]: 707/1417 cut-off events. [2023-09-01 04:37:58,665 INFO L131 PetriNetUnfolder]: For 670/670 co-relation queries the response was YES. [2023-09-01 04:37:58,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1417 events. 707/1417 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6684 event pairs, 173 based on Foata normal form. 0/1367 useless extension candidates. Maximal degree in co-relation 3498. Up to 769 conditions per place. [2023-09-01 04:37:58,670 INFO L137 encePairwiseOnDemand]: 297/309 looper letters, 104 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2023-09-01 04:37:58,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 133 transitions, 713 flow [2023-09-01 04:37:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 04:37:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 04:37:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1965 transitions. [2023-09-01 04:37:58,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42394822006472493 [2023-09-01 04:37:58,689 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1965 transitions. [2023-09-01 04:37:58,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1965 transitions. [2023-09-01 04:37:58,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:37:58,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1965 transitions. [2023-09-01 04:37:58,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:58,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 309.0) internal successors, (4944), 16 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:58,698 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 309.0) internal successors, (4944), 16 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:58,698 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 189 flow. Second operand 15 states and 1965 transitions. [2023-09-01 04:37:58,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 133 transitions, 713 flow [2023-09-01 04:37:58,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 133 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:37:58,701 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 335 flow [2023-09-01 04:37:58,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=335, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-09-01 04:37:58,702 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 24 predicate places. [2023-09-01 04:37:58,702 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 335 flow [2023-09-01 04:37:58,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 124.77777777777777) internal successors, (1123), 9 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:37:58,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:37:58,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:37:58,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 04:37:58,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:58,909 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:37:58,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:37:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash -291681981, now seen corresponding path program 2 times [2023-09-01 04:37:58,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:37:58,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982017642] [2023-09-01 04:37:58,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:37:58,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:37:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:37:58,910 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:37:58,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 04:37:59,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:37:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:37:59,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:37:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:37:59,073 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:37:59,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-09-01 04:37:59,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-09-01 04:37:59,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-09-01 04:37:59,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-09-01 04:37:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:37:59,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:37:59,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:37:59,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982017642] [2023-09-01 04:37:59,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982017642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:37:59,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:37:59,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 04:37:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194175081] [2023-09-01 04:37:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:37:59,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:37:59,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:37:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:37:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:38:00,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 309 [2023-09-01 04:38:00,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 335 flow. Second operand has 10 states, 10 states have (on average 122.6) internal successors, (1226), 10 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:00,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:38:00,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 309 [2023-09-01 04:38:00,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:38:02,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 04:38:04,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 04:38:06,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 04:38:06,598 INFO L130 PetriNetUnfolder]: 833/1656 cut-off events. [2023-09-01 04:38:06,598 INFO L131 PetriNetUnfolder]: For 1004/1006 co-relation queries the response was YES. [2023-09-01 04:38:06,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4382 conditions, 1656 events. 833/1656 cut-off events. For 1004/1006 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8262 event pairs, 168 based on Foata normal form. 2/1602 useless extension candidates. Maximal degree in co-relation 4361. Up to 691 conditions per place. [2023-09-01 04:38:06,604 INFO L137 encePairwiseOnDemand]: 299/309 looper letters, 98 selfloop transitions, 23 changer transitions 0/128 dead transitions. [2023-09-01 04:38:06,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 782 flow [2023-09-01 04:38:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:38:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:38:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1313 transitions. [2023-09-01 04:38:06,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249190938511327 [2023-09-01 04:38:06,608 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1313 transitions. [2023-09-01 04:38:06,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1313 transitions. [2023-09-01 04:38:06,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:38:06,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1313 transitions. [2023-09-01 04:38:06,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.3) internal successors, (1313), 10 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:06,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 309.0) internal successors, (3399), 11 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:06,623 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 309.0) internal successors, (3399), 11 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:06,623 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 335 flow. Second operand 10 states and 1313 transitions. [2023-09-01 04:38:06,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 782 flow [2023-09-01 04:38:06,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 774 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:38:06,627 INFO L231 Difference]: Finished difference. Result has 86 places, 71 transitions, 446 flow [2023-09-01 04:38:06,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=446, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2023-09-01 04:38:06,628 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2023-09-01 04:38:06,628 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 446 flow [2023-09-01 04:38:06,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 122.6) internal successors, (1226), 10 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:06,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:38:06,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:38:06,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 04:38:06,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:06,834 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:38:06,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:38:06,834 INFO L85 PathProgramCache]: Analyzing trace with hash -753804065, now seen corresponding path program 1 times [2023-09-01 04:38:06,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:38:06,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428362501] [2023-09-01 04:38:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:38:06,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:06,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:38:06,835 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:38:06,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 04:38:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:38:06,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 04:38:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:38:07,010 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-09-01 04:38:07,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-09-01 04:38:07,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-09-01 04:38:07,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-09-01 04:38:07,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-09-01 04:38:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:38:07,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:38:07,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:38:07,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428362501] [2023-09-01 04:38:07,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428362501] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:38:07,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:38:07,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 04:38:07,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991196340] [2023-09-01 04:38:07,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:38:07,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:38:07,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:38:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:38:07,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:38:08,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 309 [2023-09-01 04:38:08,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 446 flow. Second operand has 10 states, 10 states have (on average 122.7) internal successors, (1227), 10 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:08,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:38:08,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 309 [2023-09-01 04:38:08,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:38:08,841 INFO L130 PetriNetUnfolder]: 844/1678 cut-off events. [2023-09-01 04:38:08,841 INFO L131 PetriNetUnfolder]: For 1469/1471 co-relation queries the response was YES. [2023-09-01 04:38:08,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4722 conditions, 1678 events. 844/1678 cut-off events. For 1469/1471 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8371 event pairs, 193 based on Foata normal form. 2/1623 useless extension candidates. Maximal degree in co-relation 4697. Up to 626 conditions per place. [2023-09-01 04:38:08,846 INFO L137 encePairwiseOnDemand]: 299/309 looper letters, 95 selfloop transitions, 26 changer transitions 0/128 dead transitions. [2023-09-01 04:38:08,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 128 transitions, 862 flow [2023-09-01 04:38:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 04:38:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 04:38:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1432 transitions. [2023-09-01 04:38:08,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421300382465431 [2023-09-01 04:38:08,853 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1432 transitions. [2023-09-01 04:38:08,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1432 transitions. [2023-09-01 04:38:08,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:38:08,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1432 transitions. [2023-09-01 04:38:08,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 130.1818181818182) internal successors, (1432), 11 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:08,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 309.0) internal successors, (3708), 12 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:08,859 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 309.0) internal successors, (3708), 12 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:08,859 INFO L175 Difference]: Start difference. First operand has 86 places, 71 transitions, 446 flow. Second operand 11 states and 1432 transitions. [2023-09-01 04:38:08,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 128 transitions, 862 flow [2023-09-01 04:38:08,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 128 transitions, 834 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 04:38:08,865 INFO L231 Difference]: Finished difference. Result has 95 places, 74 transitions, 506 flow [2023-09-01 04:38:08,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=506, PETRI_PLACES=95, PETRI_TRANSITIONS=74} [2023-09-01 04:38:08,866 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2023-09-01 04:38:08,866 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 74 transitions, 506 flow [2023-09-01 04:38:08,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 122.7) internal successors, (1227), 10 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:08,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:38:08,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:38:08,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 04:38:09,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:09,075 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:38:09,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:38:09,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1371962135, now seen corresponding path program 1 times [2023-09-01 04:38:09,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:38:09,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263141342] [2023-09-01 04:38:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:38:09,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:09,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:38:09,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:38:09,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 04:38:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:38:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 04:38:09,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:38:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:38:09,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:38:09,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:38:09,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263141342] [2023-09-01 04:38:09,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263141342] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:38:09,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:38:09,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:38:09,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286713704] [2023-09-01 04:38:09,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:38:09,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:38:09,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:38:09,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:38:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:38:09,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 309 [2023-09-01 04:38:09,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 74 transitions, 506 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:09,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:38:09,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 309 [2023-09-01 04:38:09,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:38:09,516 INFO L130 PetriNetUnfolder]: 1018/2027 cut-off events. [2023-09-01 04:38:09,517 INFO L131 PetriNetUnfolder]: For 2458/2470 co-relation queries the response was YES. [2023-09-01 04:38:09,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5977 conditions, 2027 events. 1018/2027 cut-off events. For 2458/2470 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10783 event pairs, 449 based on Foata normal form. 52/2003 useless extension candidates. Maximal degree in co-relation 5949. Up to 1225 conditions per place. [2023-09-01 04:38:09,523 INFO L137 encePairwiseOnDemand]: 306/309 looper letters, 100 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2023-09-01 04:38:09,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 109 transitions, 970 flow [2023-09-01 04:38:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:38:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:38:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2023-09-01 04:38:09,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361380798274002 [2023-09-01 04:38:09,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2023-09-01 04:38:09,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2023-09-01 04:38:09,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:38:09,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2023-09-01 04:38:09,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:09,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:09,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:09,527 INFO L175 Difference]: Start difference. First operand has 95 places, 74 transitions, 506 flow. Second operand 3 states and 497 transitions. [2023-09-01 04:38:09,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 109 transitions, 970 flow [2023-09-01 04:38:09,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 109 transitions, 902 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-09-01 04:38:09,533 INFO L231 Difference]: Finished difference. Result has 91 places, 75 transitions, 473 flow [2023-09-01 04:38:09,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=473, PETRI_PLACES=91, PETRI_TRANSITIONS=75} [2023-09-01 04:38:09,534 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2023-09-01 04:38:09,534 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 75 transitions, 473 flow [2023-09-01 04:38:09,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:09,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:38:09,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:38:09,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 04:38:09,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:09,737 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:38:09,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:38:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1140202390, now seen corresponding path program 1 times [2023-09-01 04:38:09,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:38:09,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714106473] [2023-09-01 04:38:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:38:09,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:09,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:38:09,739 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:38:09,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 04:38:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:38:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:38:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:38:09,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:38:09,929 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 04:38:09,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2023-09-01 04:38:09,961 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:38:09,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 04:38:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:38:10,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:38:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:38:26,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:38:26,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714106473] [2023-09-01 04:38:26,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714106473] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:38:26,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:38:26,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:38:26,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306300382] [2023-09-01 04:38:26,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:38:26,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:38:26,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:38:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:38:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:38:30,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 309 [2023-09-01 04:38:30,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 75 transitions, 473 flow. Second operand has 6 states, 6 states have (on average 144.33333333333334) internal successors, (866), 6 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:30,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:38:30,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 309 [2023-09-01 04:38:30,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:38:35,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:38:37,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:38:39,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:38:42,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:38:42,201 INFO L130 PetriNetUnfolder]: 1765/3528 cut-off events. [2023-09-01 04:38:42,201 INFO L131 PetriNetUnfolder]: For 2738/2738 co-relation queries the response was YES. [2023-09-01 04:38:42,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10122 conditions, 3528 events. 1765/3528 cut-off events. For 2738/2738 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 17658 event pairs, 744 based on Foata normal form. 20/3396 useless extension candidates. Maximal degree in co-relation 10093. Up to 1555 conditions per place. [2023-09-01 04:38:42,212 INFO L137 encePairwiseOnDemand]: 304/309 looper letters, 146 selfloop transitions, 11 changer transitions 0/164 dead transitions. [2023-09-01 04:38:42,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 164 transitions, 1135 flow [2023-09-01 04:38:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:38:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:38:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 952 transitions. [2023-09-01 04:38:42,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5134843581445523 [2023-09-01 04:38:42,215 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 952 transitions. [2023-09-01 04:38:42,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 952 transitions. [2023-09-01 04:38:42,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:38:42,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 952 transitions. [2023-09-01 04:38:42,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:42,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:42,219 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:42,219 INFO L175 Difference]: Start difference. First operand has 91 places, 75 transitions, 473 flow. Second operand 6 states and 952 transitions. [2023-09-01 04:38:42,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 164 transitions, 1135 flow [2023-09-01 04:38:42,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 164 transitions, 1130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:38:42,227 INFO L231 Difference]: Finished difference. Result has 99 places, 80 transitions, 539 flow [2023-09-01 04:38:42,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=539, PETRI_PLACES=99, PETRI_TRANSITIONS=80} [2023-09-01 04:38:42,227 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 47 predicate places. [2023-09-01 04:38:42,227 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 80 transitions, 539 flow [2023-09-01 04:38:42,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.33333333333334) internal successors, (866), 6 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:42,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:38:42,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:38:42,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 04:38:42,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:42,437 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:38:42,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:38:42,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1159308605, now seen corresponding path program 1 times [2023-09-01 04:38:42,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:38:42,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507369489] [2023-09-01 04:38:42,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:38:42,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:42,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:38:42,439 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:38:42,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 04:38:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:38:42,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:38:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:38:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:38:42,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:38:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:38:42,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:38:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507369489] [2023-09-01 04:38:42,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507369489] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:38:42,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:38:42,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 04:38:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802501553] [2023-09-01 04:38:42,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:38:42,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:38:42,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:38:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:38:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:38:42,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 309 [2023-09-01 04:38:42,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 80 transitions, 539 flow. Second operand has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:42,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:38:42,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 309 [2023-09-01 04:38:42,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:38:43,608 INFO L130 PetriNetUnfolder]: 3367/6652 cut-off events. [2023-09-01 04:38:43,608 INFO L131 PetriNetUnfolder]: For 5637/5679 co-relation queries the response was YES. [2023-09-01 04:38:43,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18878 conditions, 6652 events. 3367/6652 cut-off events. For 5637/5679 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39520 event pairs, 424 based on Foata normal form. 482/6838 useless extension candidates. Maximal degree in co-relation 18846. Up to 1816 conditions per place. [2023-09-01 04:38:43,642 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 210 selfloop transitions, 6 changer transitions 0/223 dead transitions. [2023-09-01 04:38:43,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 223 transitions, 1960 flow [2023-09-01 04:38:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:38:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:38:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 997 transitions. [2023-09-01 04:38:43,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377562028047465 [2023-09-01 04:38:43,645 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 997 transitions. [2023-09-01 04:38:43,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 997 transitions. [2023-09-01 04:38:43,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:38:43,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 997 transitions. [2023-09-01 04:38:43,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.16666666666666) internal successors, (997), 6 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:43,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:43,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:43,659 INFO L175 Difference]: Start difference. First operand has 99 places, 80 transitions, 539 flow. Second operand 6 states and 997 transitions. [2023-09-01 04:38:43,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 223 transitions, 1960 flow [2023-09-01 04:38:43,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 223 transitions, 1899 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-09-01 04:38:43,674 INFO L231 Difference]: Finished difference. Result has 107 places, 83 transitions, 562 flow [2023-09-01 04:38:43,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=562, PETRI_PLACES=107, PETRI_TRANSITIONS=83} [2023-09-01 04:38:43,675 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 55 predicate places. [2023-09-01 04:38:43,675 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 83 transitions, 562 flow [2023-09-01 04:38:43,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:43,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:38:43,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:38:43,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 04:38:43,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:43,884 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:38:43,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:38:43,885 INFO L85 PathProgramCache]: Analyzing trace with hash -986535187, now seen corresponding path program 1 times [2023-09-01 04:38:43,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:38:43,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637648618] [2023-09-01 04:38:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:38:43,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:43,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:38:43,889 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:38:43,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 04:38:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:38:44,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:38:44,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:38:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:38:44,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:38:44,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:38:44,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637648618] [2023-09-01 04:38:44,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637648618] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:38:44,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:38:44,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:38:44,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013804507] [2023-09-01 04:38:44,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:38:44,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:38:44,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:38:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:38:44,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:38:44,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 309 [2023-09-01 04:38:44,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 83 transitions, 562 flow. Second operand has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:44,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:38:44,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 309 [2023-09-01 04:38:44,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:38:44,922 INFO L130 PetriNetUnfolder]: 2825/5632 cut-off events. [2023-09-01 04:38:44,922 INFO L131 PetriNetUnfolder]: For 9599/9637 co-relation queries the response was YES. [2023-09-01 04:38:44,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18233 conditions, 5632 events. 2825/5632 cut-off events. For 9599/9637 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 32346 event pairs, 2320 based on Foata normal form. 66/5478 useless extension candidates. Maximal degree in co-relation 18197. Up to 4893 conditions per place. [2023-09-01 04:38:44,948 INFO L137 encePairwiseOnDemand]: 306/309 looper letters, 71 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-09-01 04:38:44,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 79 transitions, 682 flow [2023-09-01 04:38:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:38:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:38:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-09-01 04:38:44,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49514563106796117 [2023-09-01 04:38:44,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-09-01 04:38:44,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-09-01 04:38:44,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:38:44,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-09-01 04:38:44,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:44,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:44,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:44,955 INFO L175 Difference]: Start difference. First operand has 107 places, 83 transitions, 562 flow. Second operand 3 states and 459 transitions. [2023-09-01 04:38:44,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 79 transitions, 682 flow [2023-09-01 04:38:44,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 79 transitions, 670 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 04:38:44,974 INFO L231 Difference]: Finished difference. Result has 106 places, 79 transitions, 528 flow [2023-09-01 04:38:44,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=528, PETRI_PLACES=106, PETRI_TRANSITIONS=79} [2023-09-01 04:38:44,975 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2023-09-01 04:38:44,975 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 79 transitions, 528 flow [2023-09-01 04:38:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:44,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:38:44,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:38:44,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 04:38:45,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:45,185 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:38:45,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:38:45,185 INFO L85 PathProgramCache]: Analyzing trace with hash 128749198, now seen corresponding path program 1 times [2023-09-01 04:38:45,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:38:45,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875458927] [2023-09-01 04:38:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:38:45,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:38:45,186 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:38:45,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 04:38:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:38:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:38:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:38:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:38:45,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:38:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:38:45,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:38:45,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875458927] [2023-09-01 04:38:45,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875458927] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:38:45,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:38:45,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-09-01 04:38:45,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786808849] [2023-09-01 04:38:45,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:38:45,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:38:45,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:38:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:38:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:38:45,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 309 [2023-09-01 04:38:45,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 79 transitions, 528 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:45,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:38:45,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 309 [2023-09-01 04:38:45,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:38:46,210 INFO L130 PetriNetUnfolder]: 3021/6097 cut-off events. [2023-09-01 04:38:46,211 INFO L131 PetriNetUnfolder]: For 7789/7813 co-relation queries the response was YES. [2023-09-01 04:38:46,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18973 conditions, 6097 events. 3021/6097 cut-off events. For 7789/7813 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 35658 event pairs, 1713 based on Foata normal form. 4/5905 useless extension candidates. Maximal degree in co-relation 18937. Up to 4199 conditions per place. [2023-09-01 04:38:46,241 INFO L137 encePairwiseOnDemand]: 302/309 looper letters, 88 selfloop transitions, 23 changer transitions 0/118 dead transitions. [2023-09-01 04:38:46,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 118 transitions, 964 flow [2023-09-01 04:38:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:38:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:38:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2023-09-01 04:38:46,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912621359223301 [2023-09-01 04:38:46,243 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2023-09-01 04:38:46,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2023-09-01 04:38:46,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:38:46,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2023-09-01 04:38:46,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:46,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:46,247 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:46,247 INFO L175 Difference]: Start difference. First operand has 106 places, 79 transitions, 528 flow. Second operand 5 states and 759 transitions. [2023-09-01 04:38:46,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 118 transitions, 964 flow [2023-09-01 04:38:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 118 transitions, 963 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:38:46,270 INFO L231 Difference]: Finished difference. Result has 109 places, 79 transitions, 595 flow [2023-09-01 04:38:46,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=595, PETRI_PLACES=109, PETRI_TRANSITIONS=79} [2023-09-01 04:38:46,271 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2023-09-01 04:38:46,271 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 79 transitions, 595 flow [2023-09-01 04:38:46,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:38:46,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:38:46,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:38:46,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 04:38:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:46,480 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:38:46,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:38:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash -356666315, now seen corresponding path program 1 times [2023-09-01 04:38:46,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:38:46,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925559689] [2023-09-01 04:38:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:38:46,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:38:46,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:38:46,481 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:38:46,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 04:38:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:38:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 04:38:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:38:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:38:46,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:38:47,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-09-01 04:39:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:39:01,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:39:01,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925559689] [2023-09-01 04:39:01,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925559689] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:39:01,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:39:01,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:39:01,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80538086] [2023-09-01 04:39:01,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:39:01,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:39:01,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:39:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:39:01,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:39:04,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 309 [2023-09-01 04:39:04,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 79 transitions, 595 flow. Second operand has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:04,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:39:04,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 309 [2023-09-01 04:39:04,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:39:10,320 INFO L130 PetriNetUnfolder]: 4374/9029 cut-off events. [2023-09-01 04:39:10,320 INFO L131 PetriNetUnfolder]: For 14481/14513 co-relation queries the response was YES. [2023-09-01 04:39:10,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29680 conditions, 9029 events. 4374/9029 cut-off events. For 14481/14513 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 57351 event pairs, 1465 based on Foata normal form. 100/8807 useless extension candidates. Maximal degree in co-relation 29643. Up to 1573 conditions per place. [2023-09-01 04:39:10,353 INFO L137 encePairwiseOnDemand]: 302/309 looper letters, 221 selfloop transitions, 24 changer transitions 0/252 dead transitions. [2023-09-01 04:39:10,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 252 transitions, 1999 flow [2023-09-01 04:39:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 04:39:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 04:39:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1868 transitions. [2023-09-01 04:39:10,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650236494896689 [2023-09-01 04:39:10,357 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1868 transitions. [2023-09-01 04:39:10,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1868 transitions. [2023-09-01 04:39:10,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:39:10,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1868 transitions. [2023-09-01 04:39:10,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.69230769230768) internal successors, (1868), 13 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:10,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 309.0) internal successors, (4326), 14 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:10,362 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 309.0) internal successors, (4326), 14 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:10,362 INFO L175 Difference]: Start difference. First operand has 109 places, 79 transitions, 595 flow. Second operand 13 states and 1868 transitions. [2023-09-01 04:39:10,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 252 transitions, 1999 flow [2023-09-01 04:39:10,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 252 transitions, 1943 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:39:10,388 INFO L231 Difference]: Finished difference. Result has 123 places, 87 transitions, 706 flow [2023-09-01 04:39:10,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=706, PETRI_PLACES=123, PETRI_TRANSITIONS=87} [2023-09-01 04:39:10,388 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 71 predicate places. [2023-09-01 04:39:10,388 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 87 transitions, 706 flow [2023-09-01 04:39:10,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:10,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:39:10,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:39:10,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 04:39:10,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:39:10,602 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:39:10,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:39:10,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1059043692, now seen corresponding path program 1 times [2023-09-01 04:39:10,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:39:10,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078130456] [2023-09-01 04:39:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:39:10,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:39:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:39:10,604 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:39:10,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 04:39:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:39:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:39:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:39:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:39:10,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:39:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:39:31,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:39:31,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078130456] [2023-09-01 04:39:31,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078130456] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:39:31,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:39:31,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 04:39:31,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419528751] [2023-09-01 04:39:31,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:39:31,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:39:31,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:39:31,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:39:31,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:39:33,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 309 [2023-09-01 04:39:33,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 87 transitions, 706 flow. Second operand has 12 states, 12 states have (on average 140.41666666666666) internal successors, (1685), 12 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:33,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:39:33,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 309 [2023-09-01 04:39:33,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:39:37,183 INFO L130 PetriNetUnfolder]: 2860/5929 cut-off events. [2023-09-01 04:39:37,183 INFO L131 PetriNetUnfolder]: For 11099/11113 co-relation queries the response was YES. [2023-09-01 04:39:37,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19840 conditions, 5929 events. 2860/5929 cut-off events. For 11099/11113 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 34463 event pairs, 901 based on Foata normal form. 54/5797 useless extension candidates. Maximal degree in co-relation 19798. Up to 1573 conditions per place. [2023-09-01 04:39:37,216 INFO L137 encePairwiseOnDemand]: 304/309 looper letters, 170 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2023-09-01 04:39:37,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 198 transitions, 1594 flow [2023-09-01 04:39:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:39:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:39:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1494 transitions. [2023-09-01 04:39:37,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48349514563106794 [2023-09-01 04:39:37,222 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1494 transitions. [2023-09-01 04:39:37,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1494 transitions. [2023-09-01 04:39:37,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:39:37,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1494 transitions. [2023-09-01 04:39:37,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 149.4) internal successors, (1494), 10 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:37,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 309.0) internal successors, (3399), 11 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:37,226 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 309.0) internal successors, (3399), 11 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:37,226 INFO L175 Difference]: Start difference. First operand has 123 places, 87 transitions, 706 flow. Second operand 10 states and 1494 transitions. [2023-09-01 04:39:37,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 198 transitions, 1594 flow [2023-09-01 04:39:37,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 198 transitions, 1548 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-09-01 04:39:37,251 INFO L231 Difference]: Finished difference. Result has 128 places, 85 transitions, 689 flow [2023-09-01 04:39:37,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=689, PETRI_PLACES=128, PETRI_TRANSITIONS=85} [2023-09-01 04:39:37,251 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 76 predicate places. [2023-09-01 04:39:37,251 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 85 transitions, 689 flow [2023-09-01 04:39:37,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.41666666666666) internal successors, (1685), 12 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:39:37,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:39:37,252 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:39:37,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 04:39:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:39:37,463 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:39:37,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:39:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1529370786, now seen corresponding path program 1 times [2023-09-01 04:39:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:39:37,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838372468] [2023-09-01 04:39:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:39:37,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:39:37,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:39:37,464 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:39:37,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 04:39:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:39:37,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 04:39:37,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:39:37,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-09-01 04:39:38,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-09-01 04:39:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:39:38,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:39:38,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 04:39:38,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2023-09-01 04:39:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:39:57,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:39:57,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838372468] [2023-09-01 04:39:57,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838372468] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:39:57,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:39:57,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 04:39:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358335741] [2023-09-01 04:39:57,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:39:57,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 04:39:57,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:39:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 04:39:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-09-01 04:40:05,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 309 [2023-09-01 04:40:05,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 85 transitions, 689 flow. Second operand has 24 states, 24 states have (on average 119.33333333333333) internal successors, (2864), 24 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:40:05,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:40:05,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 309 [2023-09-01 04:40:05,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:40:17,774 INFO L130 PetriNetUnfolder]: 5144/10473 cut-off events. [2023-09-01 04:40:17,774 INFO L131 PetriNetUnfolder]: For 17839/17916 co-relation queries the response was YES. [2023-09-01 04:40:17,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34417 conditions, 10473 events. 5144/10473 cut-off events. For 17839/17916 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 72755 event pairs, 766 based on Foata normal form. 202/10340 useless extension candidates. Maximal degree in co-relation 34373. Up to 2962 conditions per place. [2023-09-01 04:40:17,825 INFO L137 encePairwiseOnDemand]: 295/309 looper letters, 391 selfloop transitions, 88 changer transitions 0/486 dead transitions. [2023-09-01 04:40:17,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 486 transitions, 3794 flow [2023-09-01 04:40:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-09-01 04:40:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-09-01 04:40:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 5734 transitions. [2023-09-01 04:40:17,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40340509356972 [2023-09-01 04:40:17,831 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 5734 transitions. [2023-09-01 04:40:17,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 5734 transitions. [2023-09-01 04:40:17,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:40:17,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 5734 transitions. [2023-09-01 04:40:17,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 124.65217391304348) internal successors, (5734), 46 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:40:17,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 309.0) internal successors, (14523), 47 states have internal predecessors, (14523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:40:17,845 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 309.0) internal successors, (14523), 47 states have internal predecessors, (14523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:40:17,845 INFO L175 Difference]: Start difference. First operand has 128 places, 85 transitions, 689 flow. Second operand 46 states and 5734 transitions. [2023-09-01 04:40:17,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 486 transitions, 3794 flow [2023-09-01 04:40:17,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 486 transitions, 3712 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-09-01 04:40:17,894 INFO L231 Difference]: Finished difference. Result has 177 places, 149 transitions, 1392 flow [2023-09-01 04:40:17,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1392, PETRI_PLACES=177, PETRI_TRANSITIONS=149} [2023-09-01 04:40:17,895 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 125 predicate places. [2023-09-01 04:40:17,895 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 149 transitions, 1392 flow [2023-09-01 04:40:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 119.33333333333333) internal successors, (2864), 24 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:40:17,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:40:17,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:40:17,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 04:40:18,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:40:18,106 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:40:18,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:40:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1220026770, now seen corresponding path program 2 times [2023-09-01 04:40:18,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:40:18,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120268116] [2023-09-01 04:40:18,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:40:18,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:40:18,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:40:18,108 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:40:18,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 04:40:18,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:40:18,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:40:18,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 04:40:18,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:40:18,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-09-01 04:40:18,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-09-01 04:40:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:40:18,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:40:19,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 04:40:19,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2023-09-01 04:40:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:40:44,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:40:44,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120268116] [2023-09-01 04:40:44,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120268116] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:40:44,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:40:44,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 04:40:44,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824917016] [2023-09-01 04:40:44,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:40:44,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 04:40:44,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:40:44,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 04:40:44,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-09-01 04:40:53,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 309 [2023-09-01 04:40:53,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 149 transitions, 1392 flow. Second operand has 24 states, 24 states have (on average 119.33333333333333) internal successors, (2864), 24 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:40:53,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:40:53,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 309 [2023-09-01 04:40:53,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:41:52,178 INFO L130 PetriNetUnfolder]: 7944/16165 cut-off events. [2023-09-01 04:41:52,178 INFO L131 PetriNetUnfolder]: For 61538/61684 co-relation queries the response was YES. [2023-09-01 04:41:52,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63868 conditions, 16165 events. 7944/16165 cut-off events. For 61538/61684 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 121395 event pairs, 1746 based on Foata normal form. 184/15925 useless extension candidates. Maximal degree in co-relation 63812. Up to 6398 conditions per place. [2023-09-01 04:41:52,279 INFO L137 encePairwiseOnDemand]: 294/309 looper letters, 482 selfloop transitions, 118 changer transitions 0/607 dead transitions. [2023-09-01 04:41:52,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 607 transitions, 5400 flow [2023-09-01 04:41:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-09-01 04:41:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-09-01 04:41:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 6709 transitions. [2023-09-01 04:41:52,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40207359463022896 [2023-09-01 04:41:52,291 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 6709 transitions. [2023-09-01 04:41:52,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 6709 transitions. [2023-09-01 04:41:52,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:41:52,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 6709 transitions. [2023-09-01 04:41:52,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 124.24074074074075) internal successors, (6709), 54 states have internal predecessors, (6709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:52,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 309.0) internal successors, (16995), 55 states have internal predecessors, (16995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:52,305 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 309.0) internal successors, (16995), 55 states have internal predecessors, (16995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:52,306 INFO L175 Difference]: Start difference. First operand has 177 places, 149 transitions, 1392 flow. Second operand 54 states and 6709 transitions. [2023-09-01 04:41:52,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 607 transitions, 5400 flow [2023-09-01 04:41:52,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 607 transitions, 5100 flow, removed 94 selfloop flow, removed 18 redundant places. [2023-09-01 04:41:52,546 INFO L231 Difference]: Finished difference. Result has 237 places, 217 transitions, 2175 flow [2023-09-01 04:41:52,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=2175, PETRI_PLACES=237, PETRI_TRANSITIONS=217} [2023-09-01 04:41:52,547 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2023-09-01 04:41:52,547 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 217 transitions, 2175 flow [2023-09-01 04:41:52,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 119.33333333333333) internal successors, (2864), 24 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:52,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:41:52,547 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:41:52,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 04:41:52,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:41:52,748 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:41:52,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:41:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash 178314430, now seen corresponding path program 1 times [2023-09-01 04:41:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:41:52,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694339186] [2023-09-01 04:41:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:41:52,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:41:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:41:52,749 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:41:52,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 04:41:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:41:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:41:52,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:41:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 04:41:52,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:41:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 04:41:53,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:41:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694339186] [2023-09-01 04:41:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694339186] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:41:53,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:41:53,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-09-01 04:41:53,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457286227] [2023-09-01 04:41:53,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:41:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:41:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:41:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:41:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:41:53,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 309 [2023-09-01 04:41:53,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 217 transitions, 2175 flow. Second operand has 12 states, 12 states have (on average 149.83333333333334) internal successors, (1798), 12 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:53,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:41:53,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 309 [2023-09-01 04:41:53,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:41:57,951 INFO L130 PetriNetUnfolder]: 15241/30394 cut-off events. [2023-09-01 04:41:57,952 INFO L131 PetriNetUnfolder]: For 236239/236981 co-relation queries the response was YES. [2023-09-01 04:41:58,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137130 conditions, 30394 events. 15241/30394 cut-off events. For 236239/236981 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 246030 event pairs, 998 based on Foata normal form. 2117/31740 useless extension candidates. Maximal degree in co-relation 137055. Up to 4865 conditions per place. [2023-09-01 04:41:58,237 INFO L137 encePairwiseOnDemand]: 305/309 looper letters, 1120 selfloop transitions, 9 changer transitions 0/1136 dead transitions. [2023-09-01 04:41:58,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 1136 transitions, 14102 flow [2023-09-01 04:41:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 04:41:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 04:41:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1482 transitions. [2023-09-01 04:41:58,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329018338727076 [2023-09-01 04:41:58,241 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1482 transitions. [2023-09-01 04:41:58,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1482 transitions. [2023-09-01 04:41:58,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:41:58,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1482 transitions. [2023-09-01 04:41:58,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.66666666666666) internal successors, (1482), 9 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:58,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 309.0) internal successors, (3090), 10 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:58,244 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 309.0) internal successors, (3090), 10 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:58,245 INFO L175 Difference]: Start difference. First operand has 237 places, 217 transitions, 2175 flow. Second operand 9 states and 1482 transitions. [2023-09-01 04:41:58,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 1136 transitions, 14102 flow [2023-09-01 04:41:59,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1136 transitions, 13098 flow, removed 388 selfloop flow, removed 15 redundant places. [2023-09-01 04:41:59,093 INFO L231 Difference]: Finished difference. Result has 234 places, 221 transitions, 2060 flow [2023-09-01 04:41:59,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2060, PETRI_PLACES=234, PETRI_TRANSITIONS=221} [2023-09-01 04:41:59,093 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2023-09-01 04:41:59,094 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 221 transitions, 2060 flow [2023-09-01 04:41:59,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 149.83333333333334) internal successors, (1798), 12 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:41:59,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:41:59,094 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:41:59,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-09-01 04:41:59,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:41:59,299 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-09-01 04:41:59,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:41:59,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2132254092, now seen corresponding path program 1 times [2023-09-01 04:41:59,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:41:59,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150993259] [2023-09-01 04:41:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:41:59,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:41:59,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:41:59,301 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:41:59,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 04:41:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:41:59,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 04:41:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:41:59,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-09-01 04:42:00,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-09-01 04:42:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:42:00,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:42:00,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 04:42:00,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 Killed by 15