./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --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 04:06:50,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:06:50,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:06:50,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:06:50,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:06:50,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:06:50,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:06:50,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:06:50,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:06:50,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:06:50,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:06:50,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:06:50,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:06:50,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:06:50,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:06:50,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:06:50,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:06:50,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:06:50,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:06:50,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:06:50,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:06:50,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:06:50,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:06:50,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:06:50,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:06:50,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:06:50,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:06:50,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:06:50,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:06:50,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:06:50,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:06:50,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:06:50,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:06:50,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:06:50,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:06:50,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:06:50,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:06:50,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:06:50,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:06:50,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:06:50,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:06:50,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:06:50,768 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:06:50,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:06:50,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:06:50,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:06:50,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:06:50,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:06:50,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:06:50,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:06:50,772 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:06:50,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:06:50,772 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:06:50,773 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:06:50,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:06:50,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:06:50,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:06:50,773 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:06:50,773 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:06:50,774 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:06:50,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:06:50,774 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:06:50,774 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:06:50,774 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:06:50,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:06:50,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:06:50,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:06:50,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:06:50,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:06:50,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:06:50,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:06:50,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:06:50,776 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:06:50,776 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:06:50,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:06:50,776 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:06:50,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:06:51,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:06:51,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:06:51,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:06:51,054 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:06:51,065 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:06:51,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-09-01 04:06:52,072 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:06:52,272 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:06:52,273 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-09-01 04:06:52,297 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf3d8fe6a/24fd5c7068cc45c199b582ada7740825/FLAGb703e71d8 [2023-09-01 04:06:52,319 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf3d8fe6a/24fd5c7068cc45c199b582ada7740825 [2023-09-01 04:06:52,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:06:52,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:06:52,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:06:52,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:06:52,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:06:52,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:06:52" (1/1) ... [2023-09-01 04:06:52,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b74465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:52, skipping insertion in model container [2023-09-01 04:06:52,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:06:52" (1/1) ... [2023-09-01 04:06:52,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:06:52,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:06:52,494 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-09-01 04:06:52,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:06:52,517 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 04:06:52,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6af623c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:52, skipping insertion in model container [2023-09-01 04:06:52,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:06:52,519 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 04:06:52,521 INFO L158 Benchmark]: Toolchain (without parser) took 198.15ms. Allocated memory is still 67.1MB. Free memory was 44.6MB in the beginning and 35.0MB in the end (delta: 9.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-09-01 04:06:52,521 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 54.5MB. Free memory was 32.4MB in the beginning and 32.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:06:52,522 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.63ms. Allocated memory is still 67.1MB. Free memory was 44.4MB in the beginning and 35.0MB in the end (delta: 9.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-09-01 04:06:52,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 54.5MB. Free memory was 32.4MB in the beginning and 32.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.63ms. Allocated memory is still 67.1MB. Free memory was 44.4MB in the beginning and 35.0MB in the end (delta: 9.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) 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/weaver/test-context1.wvr.c -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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --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 04:06:54,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:06:54,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:06:54,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:06:54,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:06:54,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:06:54,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:06:54,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:06:54,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:06:54,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:06:54,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:06:54,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:06:54,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:06:54,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:06:54,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:06:54,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:06:54,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:06:54,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:06:54,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:06:54,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:06:54,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:06:54,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:06:54,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:06:54,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:06:54,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:06:54,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:06:54,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:06:54,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:06:54,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:06:54,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:06:54,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:06:54,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:06:54,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:06:54,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:06:54,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:06:54,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:06:54,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:06:54,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:06:54,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:06:54,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:06:54,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:06:54,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:06:54,176 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:06:54,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:06:54,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:06:54,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:06:54,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:06:54,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:06:54,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:06:54,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:06:54,179 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:06:54,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:06:54,180 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:06:54,180 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:06:54,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:06:54,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:06:54,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:06:54,181 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:06:54,181 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:06:54,181 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:06:54,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:06:54,181 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:06:54,182 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:06:54,182 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:06:54,182 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:06:54,182 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:06:54,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:06:54,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:06:54,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:06:54,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:06:54,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:06:54,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:06:54,183 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:06:54,183 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:06:54,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:06:54,184 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:06:54,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:06:54,184 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:06:54,184 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:06:54,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:06:54,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:06:54,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:06:54,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:06:54,499 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:06:54,499 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:06:54,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-09-01 04:06:55,512 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:06:55,719 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:06:55,720 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-09-01 04:06:55,724 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f522dc3a/291e746251474acb9e2ef2721247d03e/FLAG2d42937c5 [2023-09-01 04:06:55,740 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f522dc3a/291e746251474acb9e2ef2721247d03e [2023-09-01 04:06:55,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:06:55,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:06:55,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:06:55,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:06:55,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:06:55,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:06:55" (1/1) ... [2023-09-01 04:06:55,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65630f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:55, skipping insertion in model container [2023-09-01 04:06:55,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:06:55" (1/1) ... [2023-09-01 04:06:55,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:06:55,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:06:55,924 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-09-01 04:06:55,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:06:55,947 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 04:06:55,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:06:55,978 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-09-01 04:06:55,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:06:55,989 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:06:56,015 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-09-01 04:06:56,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:06:56,030 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 04:06:56,031 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 04:06:56,036 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:06:56,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56 WrapperNode [2023-09-01 04:06:56,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:06:56,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:06:56,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:06:56,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:06:56,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,083 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 133 [2023-09-01 04:06:56,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:06:56,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:06:56,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:06:56,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:06:56,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,127 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:06:56,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:06:56,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:06:56,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:06:56,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (1/1) ... [2023-09-01 04:06:56,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:06:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:06:56,214 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 04:06:56,238 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 04:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:06:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:06:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:06:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:06:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:06:56,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:06:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:06:56,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 04:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 04:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 04:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:06:56,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:06:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:06:56,252 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 04:06:56,372 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:06:56,386 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:06:56,689 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:06:56,776 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:06:56,777 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:06:56,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:06:56 BoogieIcfgContainer [2023-09-01 04:06:56,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:06:56,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:06:56,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:06:56,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:06:56,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:06:55" (1/3) ... [2023-09-01 04:06:56,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a1b3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:06:56, skipping insertion in model container [2023-09-01 04:06:56,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:06:56" (2/3) ... [2023-09-01 04:06:56,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a1b3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:06:56, skipping insertion in model container [2023-09-01 04:06:56,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:06:56" (3/3) ... [2023-09-01 04:06:56,784 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-09-01 04:06:56,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:06:56,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 04:06:56,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:06:56,869 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:06:56,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 268 flow [2023-09-01 04:06:56,954 INFO L130 PetriNetUnfolder]: 9/124 cut-off events. [2023-09-01 04:06:56,955 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:06:56,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 9/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2023-09-01 04:06:56,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 126 transitions, 268 flow [2023-09-01 04:06:56,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 120 transitions, 252 flow [2023-09-01 04:06:56,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:06:56,976 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 120 transitions, 252 flow [2023-09-01 04:06:56,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 120 transitions, 252 flow [2023-09-01 04:06:56,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 252 flow [2023-09-01 04:06:57,011 INFO L130 PetriNetUnfolder]: 9/120 cut-off events. [2023-09-01 04:06:57,011 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:06:57,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 120 events. 9/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2023-09-01 04:06:57,013 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-09-01 04:07:06,944 INFO L134 LiptonReduction]: Checked pairs total: 1055 [2023-09-01 04:07:06,945 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-09-01 04:07:06,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:07:06,959 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;@273f1da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:07:06,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-09-01 04:07:06,966 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 04:07:06,967 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:07:06,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:06,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:07:06,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:06,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash 18173, now seen corresponding path program 1 times [2023-09-01 04:07:06,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:06,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940474410] [2023-09-01 04:07:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:06,986 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 04:07:06,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:06,991 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 04:07:07,009 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 04:07:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:07,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:07:07,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:07,230 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:07:07,231 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:07:07,265 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 04:07:07,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:07,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:07,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940474410] [2023-09-01 04:07:07,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940474410] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:07,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:07,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641426531] [2023-09-01 04:07:07,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:07,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:07,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:07,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-09-01 04:07:07,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:07,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:07,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-09-01 04:07:07,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:07,557 INFO L130 PetriNetUnfolder]: 146/249 cut-off events. [2023-09-01 04:07:07,558 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 04:07:07,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 249 events. 146/249 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 801 event pairs, 105 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 424. Up to 249 conditions per place. [2023-09-01 04:07:07,561 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 04:07:07,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 124 flow [2023-09-01 04:07:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-09-01 04:07:07,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448818897637795 [2023-09-01 04:07:07,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-09-01 04:07:07,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-09-01 04:07:07,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:07,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-09-01 04:07:07,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:07,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:07,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:07,583 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 339 transitions. [2023-09-01 04:07:07,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 124 flow [2023-09-01 04:07:07,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:07:07,587 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 62 flow [2023-09-01 04:07:07,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-09-01 04:07:07,592 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-09-01 04:07:07,593 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 62 flow [2023-09-01 04:07:07,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:07,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:07,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:07:07,605 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 (2)] Ended with exit code 0 [2023-09-01 04:07:07,806 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 04:07:07,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:07,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash 18200, now seen corresponding path program 1 times [2023-09-01 04:07:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:07,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802876472] [2023-09-01 04:07:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:07,814 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 04:07:07,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:07,815 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 04:07:07,829 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 04:07:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:07:07,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:07,919 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-09-01 04:07:07,920 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 04:07:07,939 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 04:07:07,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:07,939 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802876472] [2023-09-01 04:07:07,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802876472] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:07,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:07,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:07,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484887528] [2023-09-01 04:07:07,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:07,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:07,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:07,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:07,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-09-01 04:07:07,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:07,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:07,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-09-01 04:07:07,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:08,148 INFO L130 PetriNetUnfolder]: 114/200 cut-off events. [2023-09-01 04:07:08,148 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 04:07:08,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 200 events. 114/200 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 611 event pairs, 81 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 403. Up to 200 conditions per place. [2023-09-01 04:07:08,151 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-09-01 04:07:08,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 110 flow [2023-09-01 04:07:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-09-01 04:07:08,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304461942257218 [2023-09-01 04:07:08,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-09-01 04:07:08,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-09-01 04:07:08,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:08,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-09-01 04:07:08,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,161 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 62 flow. Second operand 3 states and 328 transitions. [2023-09-01 04:07:08,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 110 flow [2023-09-01 04:07:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:08,162 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 59 flow [2023-09-01 04:07:08,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-09-01 04:07:08,163 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-09-01 04:07:08,163 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 59 flow [2023-09-01 04:07:08,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:08,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:07:08,184 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 04:07:08,363 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 04:07:08,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:08,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash 18174, now seen corresponding path program 1 times [2023-09-01 04:07:08,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:08,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484035032] [2023-09-01 04:07:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:08,365 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 04:07:08,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:08,370 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 04:07:08,372 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 04:07:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:08,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:07:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:08,498 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:08,499 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:08,519 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 04:07:08,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:08,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:08,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484035032] [2023-09-01 04:07:08,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484035032] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:08,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:08,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:08,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921000083] [2023-09-01 04:07:08,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:08,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:08,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:08,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:08,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-09-01 04:07:08,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:08,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-09-01 04:07:08,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:08,806 INFO L130 PetriNetUnfolder]: 227/398 cut-off events. [2023-09-01 04:07:08,806 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 04:07:08,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 398 events. 227/398 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1543 event pairs, 162 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 804. Up to 201 conditions per place. [2023-09-01 04:07:08,809 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 48 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-09-01 04:07:08,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 50 transitions, 211 flow [2023-09-01 04:07:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-09-01 04:07:08,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47244094488188976 [2023-09-01 04:07:08,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-09-01 04:07:08,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-09-01 04:07:08,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:08,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-09-01 04:07:08,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,816 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 59 flow. Second operand 3 states and 360 transitions. [2023-09-01 04:07:08,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 50 transitions, 211 flow [2023-09-01 04:07:08,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:08,817 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 70 flow [2023-09-01 04:07:08,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-09-01 04:07:08,818 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-09-01 04:07:08,819 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 70 flow [2023-09-01 04:07:08,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:08,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:08,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:07:08,841 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 04:07:09,029 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 04:07:09,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:09,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash 18199, now seen corresponding path program 1 times [2023-09-01 04:07:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:09,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381604092] [2023-09-01 04:07:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:09,031 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 04:07:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:09,032 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 04:07:09,035 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 04:07:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:09,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:07:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:07:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:07:09,129 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 04:07:09,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 04:07:09,141 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 10 treesize of output 8 [2023-09-01 04:07:09,164 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 04:07:09,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:09,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381604092] [2023-09-01 04:07:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381604092] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:09,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:09,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:09,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837445483] [2023-09-01 04:07:09,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:09,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:09,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:09,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-09-01 04:07:09,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:09,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:09,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-09-01 04:07:09,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:09,350 INFO L130 PetriNetUnfolder]: 163/300 cut-off events. [2023-09-01 04:07:09,350 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 04:07:09,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 300 events. 163/300 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1106 event pairs, 114 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 612. Up to 300 conditions per place. [2023-09-01 04:07:09,352 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-09-01 04:07:09,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 116 flow [2023-09-01 04:07:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-09-01 04:07:09,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43963254593175854 [2023-09-01 04:07:09,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-09-01 04:07:09,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-09-01 04:07:09,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:09,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-09-01 04:07:09,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:09,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:09,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:09,356 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 70 flow. Second operand 3 states and 335 transitions. [2023-09-01 04:07:09,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 116 flow [2023-09-01 04:07:09,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:09,357 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 66 flow [2023-09-01 04:07:09,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-09-01 04:07:09,358 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-09-01 04:07:09,358 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 66 flow [2023-09-01 04:07:09,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:09,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:09,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:07:09,380 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 04:07:09,583 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 04:07:09,584 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:09,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:09,584 INFO L85 PathProgramCache]: Analyzing trace with hash 564859, now seen corresponding path program 1 times [2023-09-01 04:07:09,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:09,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476528779] [2023-09-01 04:07:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:09,585 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 04:07:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:09,595 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 04:07:09,596 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 04:07:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:09,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:07:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:09,695 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:09,695 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:09,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:09,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:09,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476528779] [2023-09-01 04:07:09,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476528779] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:09,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:09,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:07:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620539611] [2023-09-01 04:07:09,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:07:09,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:09,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:07:09,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:07:10,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 254 [2023-09-01 04:07:10,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 66 flow. Second operand has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:10,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:10,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 254 [2023-09-01 04:07:10,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:10,689 INFO L130 PetriNetUnfolder]: 246/453 cut-off events. [2023-09-01 04:07:10,690 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 04:07:10,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 453 events. 246/453 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1865 event pairs, 171 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 925. Up to 151 conditions per place. [2023-09-01 04:07:10,693 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 65 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-09-01 04:07:10,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 72 transitions, 318 flow [2023-09-01 04:07:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:07:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:07:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 663 transitions. [2023-09-01 04:07:10,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43503937007874016 [2023-09-01 04:07:10,695 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 663 transitions. [2023-09-01 04:07:10,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 663 transitions. [2023-09-01 04:07:10,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:10,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 663 transitions. [2023-09-01 04:07:10,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.5) internal successors, (663), 6 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:10,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:10,699 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:10,699 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 66 flow. Second operand 6 states and 663 transitions. [2023-09-01 04:07:10,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 72 transitions, 318 flow [2023-09-01 04:07:10,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 72 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:10,702 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 119 flow [2023-09-01 04:07:10,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-09-01 04:07:10,704 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-09-01 04:07:10,705 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 119 flow [2023-09-01 04:07:10,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:10,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:10,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 04:07:10,723 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 04:07:10,912 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 04:07:10,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:10,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:10,913 INFO L85 PathProgramCache]: Analyzing trace with hash 17504350, now seen corresponding path program 1 times [2023-09-01 04:07:10,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:10,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2566356] [2023-09-01 04:07:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:10,914 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 04:07:10,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:10,919 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 04:07:10,921 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 04:07:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:07:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:11,008 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 04:07:11,009 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 2 case distinctions, treesize of input 12 treesize of output 22 [2023-09-01 04:07:11,027 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 04:07:11,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:11,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:11,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2566356] [2023-09-01 04:07:11,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2566356] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:11,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:11,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:11,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503891004] [2023-09-01 04:07:11,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:11,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:11,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-09-01 04:07:11,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:11,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-09-01 04:07:11,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:11,199 INFO L130 PetriNetUnfolder]: 222/405 cut-off events. [2023-09-01 04:07:11,199 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:07:11,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 405 events. 222/405 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1626 event pairs, 153 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 850. Up to 405 conditions per place. [2023-09-01 04:07:11,202 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 04:07:11,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 28 transitions, 171 flow [2023-09-01 04:07:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-09-01 04:07:11,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251968503937008 [2023-09-01 04:07:11,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-09-01 04:07:11,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-09-01 04:07:11,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:11,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-09-01 04:07:11,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,214 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 119 flow. Second operand 3 states and 324 transitions. [2023-09-01 04:07:11,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 28 transitions, 171 flow [2023-09-01 04:07:11,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 161 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:11,216 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 107 flow [2023-09-01 04:07:11,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-09-01 04:07:11,218 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-09-01 04:07:11,219 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 107 flow [2023-09-01 04:07:11,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:11,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 04:07:11,228 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 04:07:11,426 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 04:07:11,435 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:11,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 17504352, now seen corresponding path program 1 times [2023-09-01 04:07:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:11,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442434714] [2023-09-01 04:07:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:11,437 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 04:07:11,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:11,438 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 04:07:11,454 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 04:07:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:07:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:11,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:07:11,541 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-09-01 04:07:11,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 23 [2023-09-01 04:07:11,550 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 42 treesize of output 38 [2023-09-01 04:07:11,583 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 04:07:11,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:11,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442434714] [2023-09-01 04:07:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442434714] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:11,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:11,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:11,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139153331] [2023-09-01 04:07:11,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:11,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:11,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:11,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:11,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:11,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-09-01 04:07:11,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:11,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-09-01 04:07:11,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:11,711 INFO L130 PetriNetUnfolder]: 198/357 cut-off events. [2023-09-01 04:07:11,711 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 04:07:11,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 357 events. 198/357 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1377 event pairs, 135 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 750. Up to 357 conditions per place. [2023-09-01 04:07:11,713 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-09-01 04:07:11,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 155 flow [2023-09-01 04:07:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-09-01 04:07:11,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343832020997375 [2023-09-01 04:07:11,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-09-01 04:07:11,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-09-01 04:07:11,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:11,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-09-01 04:07:11,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,716 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 107 flow. Second operand 3 states and 331 transitions. [2023-09-01 04:07:11,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 155 flow [2023-09-01 04:07:11,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:11,719 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 104 flow [2023-09-01 04:07:11,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-09-01 04:07:11,720 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-09-01 04:07:11,720 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 104 flow [2023-09-01 04:07:11,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:11,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:11,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 04:07:11,731 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 04:07:11,929 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 04:07:11,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:11,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash 17504340, now seen corresponding path program 1 times [2023-09-01 04:07:11,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:11,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856946438] [2023-09-01 04:07:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:11,931 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 04:07:11,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:11,932 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 04:07:11,935 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 04:07:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 04:07:11,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:12,066 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:12,067 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:12,121 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 04:07:12,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:12,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:12,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856946438] [2023-09-01 04:07:12,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856946438] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:12,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:12,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:07:12,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111458253] [2023-09-01 04:07:12,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:12,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:12,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:12,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:07:12,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-09-01 04:07:12,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:12,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-09-01 04:07:12,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:12,413 INFO L130 PetriNetUnfolder]: 258/489 cut-off events. [2023-09-01 04:07:12,414 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 04:07:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 489 events. 258/489 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2257 event pairs, 93 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 1023. Up to 361 conditions per place. [2023-09-01 04:07:12,416 INFO L137 encePairwiseOnDemand]: 247/254 looper letters, 32 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-09-01 04:07:12,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 203 flow [2023-09-01 04:07:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:07:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:07:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2023-09-01 04:07:12,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281496062992126 [2023-09-01 04:07:12,419 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2023-09-01 04:07:12,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2023-09-01 04:07:12,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:12,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2023-09-01 04:07:12,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,423 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 104 flow. Second operand 4 states and 435 transitions. [2023-09-01 04:07:12,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 203 flow [2023-09-01 04:07:12,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:12,428 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 129 flow [2023-09-01 04:07:12,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-09-01 04:07:12,430 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-09-01 04:07:12,430 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 129 flow [2023-09-01 04:07:12,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:12,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 04:07:12,441 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 (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:07:12,638 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 04:07:12,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:12,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash 17504341, now seen corresponding path program 1 times [2023-09-01 04:07:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321112895] [2023-09-01 04:07:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:12,643 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 04:07:12,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:12,644 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 04:07:12,646 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 04:07:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:12,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:07:12,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:12,719 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:07:12,719 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:07:12,732 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 04:07:12,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:12,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:12,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321112895] [2023-09-01 04:07:12,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321112895] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:12,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:12,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:07:12,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310467343] [2023-09-01 04:07:12,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:12,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:12,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:12,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:12,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:07:12,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 254 [2023-09-01 04:07:12,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:12,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 254 [2023-09-01 04:07:12,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:12,946 INFO L130 PetriNetUnfolder]: 165/324 cut-off events. [2023-09-01 04:07:12,947 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-09-01 04:07:12,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 324 events. 165/324 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1275 event pairs, 114 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 824. Up to 317 conditions per place. [2023-09-01 04:07:12,948 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 21 selfloop transitions, 4 changer transitions 0/25 dead transitions. [2023-09-01 04:07:12,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 25 transitions, 173 flow [2023-09-01 04:07:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:07:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:07:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 424 transitions. [2023-09-01 04:07:12,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41732283464566927 [2023-09-01 04:07:12,950 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 424 transitions. [2023-09-01 04:07:12,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 424 transitions. [2023-09-01 04:07:12,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:12,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 424 transitions. [2023-09-01 04:07:12,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,952 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 129 flow. Second operand 4 states and 424 transitions. [2023-09-01 04:07:12,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 25 transitions, 173 flow [2023-09-01 04:07:12,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 25 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:07:12,953 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 125 flow [2023-09-01 04:07:12,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2023-09-01 04:07:12,954 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-09-01 04:07:12,954 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 125 flow [2023-09-01 04:07:12,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:12,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:12,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:07:12,963 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 04:07:13,161 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 04:07:13,162 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:13,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash 542635102, now seen corresponding path program 1 times [2023-09-01 04:07:13,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:13,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554630039] [2023-09-01 04:07:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:13,163 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 04:07:13,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:13,164 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 04:07:13,166 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 (11)] Waiting until timeout for monitored process [2023-09-01 04:07:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:13,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 04:07:13,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:13,285 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:13,286 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:13,373 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 04:07:13,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:13,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:13,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554630039] [2023-09-01 04:07:13,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554630039] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:13,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:13,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:07:13,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027713797] [2023-09-01 04:07:13,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:13,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:13,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:13,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:13,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:07:13,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-09-01 04:07:13,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:13,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:13,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-09-01 04:07:13,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:13,707 INFO L130 PetriNetUnfolder]: 120/247 cut-off events. [2023-09-01 04:07:13,707 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-09-01 04:07:13,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 247 events. 120/247 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 898 event pairs, 85 based on Foata normal form. 6/221 useless extension candidates. Maximal degree in co-relation 616. Up to 219 conditions per place. [2023-09-01 04:07:13,708 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 33 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-09-01 04:07:13,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 231 flow [2023-09-01 04:07:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:07:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:07:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2023-09-01 04:07:13,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242125984251969 [2023-09-01 04:07:13,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 431 transitions. [2023-09-01 04:07:13,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 431 transitions. [2023-09-01 04:07:13,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:13,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 431 transitions. [2023-09-01 04:07:13,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.75) internal successors, (431), 4 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 04:07:13,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:13,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:13,715 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 125 flow. Second operand 4 states and 431 transitions. [2023-09-01 04:07:13,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 231 flow [2023-09-01 04:07:13,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:07:13,717 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 143 flow [2023-09-01 04:07:13,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-09-01 04:07:13,718 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-09-01 04:07:13,718 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 143 flow [2023-09-01 04:07:13,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:13,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:13,719 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 04:07:13,728 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 (11)] Ended with exit code 0 [2023-09-01 04:07:13,926 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 04:07:13,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:13,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash -350699970, now seen corresponding path program 2 times [2023-09-01 04:07:13,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:13,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974897058] [2023-09-01 04:07:13,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:07:13,928 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 04:07:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:13,929 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 04:07:13,931 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 04:07:14,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:07:14,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 04:07:14,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:14,049 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:14,049 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:14,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:14,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974897058] [2023-09-01 04:07:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974897058] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:14,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:14,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:07:14,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230644508] [2023-09-01 04:07:14,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:14,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:07:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:07:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:07:16,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 254 [2023-09-01 04:07:16,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 143 flow. Second operand has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:16,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:16,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 254 [2023-09-01 04:07:16,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:18,619 INFO L130 PetriNetUnfolder]: 497/987 cut-off events. [2023-09-01 04:07:18,619 INFO L131 PetriNetUnfolder]: For 308/308 co-relation queries the response was YES. [2023-09-01 04:07:18,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 987 events. 497/987 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4844 event pairs, 351 based on Foata normal form. 6/849 useless extension candidates. Maximal degree in co-relation 2500. Up to 343 conditions per place. [2023-09-01 04:07:18,625 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 157 selfloop transitions, 12 changer transitions 0/169 dead transitions. [2023-09-01 04:07:18,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 169 transitions, 974 flow [2023-09-01 04:07:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:07:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:07:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1354 transitions. [2023-09-01 04:07:18,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44422572178477693 [2023-09-01 04:07:18,632 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1354 transitions. [2023-09-01 04:07:18,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1354 transitions. [2023-09-01 04:07:18,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:18,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1354 transitions. [2023-09-01 04:07:18,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 112.83333333333333) internal successors, (1354), 12 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:18,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:18,643 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:18,643 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 143 flow. Second operand 12 states and 1354 transitions. [2023-09-01 04:07:18,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 169 transitions, 974 flow [2023-09-01 04:07:18,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 169 transitions, 964 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 04:07:18,649 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 234 flow [2023-09-01 04:07:18,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=234, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2023-09-01 04:07:18,650 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-09-01 04:07:18,650 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 234 flow [2023-09-01 04:07:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:18,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:18,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:07:18,661 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 (12)] Ended with exit code 0 [2023-09-01 04:07:18,860 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 04:07:18,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:18,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash -350941247, now seen corresponding path program 1 times [2023-09-01 04:07:18,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:18,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035755025] [2023-09-01 04:07:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:18,862 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 04:07:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:18,863 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 04:07:18,865 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 04:07:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 04:07:18,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:18,995 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:18,996 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:07:19,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:07:19,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035755025] [2023-09-01 04:07:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035755025] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:19,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:19,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:07:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255824313] [2023-09-01 04:07:19,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:07:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:07:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:07:20,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 254 [2023-09-01 04:07:20,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 234 flow. Second operand has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:20,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:20,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 254 [2023-09-01 04:07:20,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:22,945 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 04:07:24,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:27,013 WARN L539 Checker$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 04:07:29,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:31,020 WARN L539 Checker$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 04:07:33,126 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 04:07:33,596 INFO L130 PetriNetUnfolder]: 1397/2661 cut-off events. [2023-09-01 04:07:33,596 INFO L131 PetriNetUnfolder]: For 429/429 co-relation queries the response was YES. [2023-09-01 04:07:33,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6587 conditions, 2661 events. 1397/2661 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16629 event pairs, 162 based on Foata normal form. 0/2355 useless extension candidates. Maximal degree in co-relation 6559. Up to 973 conditions per place. [2023-09-01 04:07:33,609 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 72 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2023-09-01 04:07:33,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 552 flow [2023-09-01 04:07:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 04:07:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 04:07:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 862 transitions. [2023-09-01 04:07:33,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242125984251969 [2023-09-01 04:07:33,613 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 862 transitions. [2023-09-01 04:07:33,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 862 transitions. [2023-09-01 04:07:33,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:33,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 862 transitions. [2023-09-01 04:07:33,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:33,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 254.0) internal successors, (2286), 9 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:33,617 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 254.0) internal successors, (2286), 9 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:33,617 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 234 flow. Second operand 8 states and 862 transitions. [2023-09-01 04:07:33,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 552 flow [2023-09-01 04:07:33,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 527 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 04:07:33,620 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 298 flow [2023-09-01 04:07:33,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-09-01 04:07:33,621 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2023-09-01 04:07:33,621 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 298 flow [2023-09-01 04:07:33,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:33,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:33,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:33,641 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 04:07:33,829 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 04:07:33,830 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:33,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash -934251311, now seen corresponding path program 1 times [2023-09-01 04:07:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:33,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243088425] [2023-09-01 04:07:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:33,831 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 04:07:33,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:33,834 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 04:07:33,836 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 (14)] Waiting until timeout for monitored process [2023-09-01 04:07:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:07:33,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:07:34,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:34,062 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 38 treesize of output 34 [2023-09-01 04:07:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:07:34,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:34,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243088425] [2023-09-01 04:07:34,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243088425] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:34,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:34,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 04:07:34,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827276482] [2023-09-01 04:07:34,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:34,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:07:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:07:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:07:34,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-09-01 04:07:34,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 298 flow. Second operand has 10 states, 10 states have (on average 101.8) internal successors, (1018), 10 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:34,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:34,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-09-01 04:07:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:38,292 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 04:07:40,468 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 04:07:41,629 INFO L130 PetriNetUnfolder]: 2234/4290 cut-off events. [2023-09-01 04:07:41,629 INFO L131 PetriNetUnfolder]: For 4218/4218 co-relation queries the response was YES. [2023-09-01 04:07:41,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13209 conditions, 4290 events. 2234/4290 cut-off events. For 4218/4218 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29893 event pairs, 162 based on Foata normal form. 450/4740 useless extension candidates. Maximal degree in co-relation 13176. Up to 1549 conditions per place. [2023-09-01 04:07:41,661 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 109 selfloop transitions, 18 changer transitions 0/127 dead transitions. [2023-09-01 04:07:41,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 832 flow [2023-09-01 04:07:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 04:07:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 04:07:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1217 transitions. [2023-09-01 04:07:41,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355762347888332 [2023-09-01 04:07:41,666 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1217 transitions. [2023-09-01 04:07:41,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1217 transitions. [2023-09-01 04:07:41,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:41,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1217 transitions. [2023-09-01 04:07:41,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 110.63636363636364) internal successors, (1217), 11 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:41,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:41,674 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:41,678 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 298 flow. Second operand 11 states and 1217 transitions. [2023-09-01 04:07:41,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 832 flow [2023-09-01 04:07:41,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 127 transitions, 804 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 04:07:41,696 INFO L231 Difference]: Finished difference. Result has 78 places, 49 transitions, 396 flow [2023-09-01 04:07:41,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=396, PETRI_PLACES=78, PETRI_TRANSITIONS=49} [2023-09-01 04:07:41,697 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 44 predicate places. [2023-09-01 04:07:41,697 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 49 transitions, 396 flow [2023-09-01 04:07:41,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.8) internal successors, (1018), 10 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:41,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:41,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:41,709 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 04:07:41,906 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 04:07:41,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:41,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:41,907 INFO L85 PathProgramCache]: Analyzing trace with hash -934251652, now seen corresponding path program 1 times [2023-09-01 04:07:41,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:41,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969660689] [2023-09-01 04:07:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:41,907 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 04:07:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:41,913 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 04:07:41,915 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 04:07:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:07:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:07:42,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:07:42,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969660689] [2023-09-01 04:07:42,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969660689] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:42,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:42,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:07:42,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766852935] [2023-09-01 04:07:42,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:42,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:07:42,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:07:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:07:42,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-09-01 04:07:42,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 49 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:42,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:42,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-09-01 04:07:42,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:42,719 INFO L130 PetriNetUnfolder]: 2486/4758 cut-off events. [2023-09-01 04:07:42,719 INFO L131 PetriNetUnfolder]: For 14961/14961 co-relation queries the response was YES. [2023-09-01 04:07:42,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17147 conditions, 4758 events. 2486/4758 cut-off events. For 14961/14961 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33155 event pairs, 684 based on Foata normal form. 252/5010 useless extension candidates. Maximal degree in co-relation 17107. Up to 2908 conditions per place. [2023-09-01 04:07:42,794 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 62 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2023-09-01 04:07:42,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 643 flow [2023-09-01 04:07:42,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:07:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:07:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2023-09-01 04:07:42,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468503937007874 [2023-09-01 04:07:42,806 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2023-09-01 04:07:42,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2023-09-01 04:07:42,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:42,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2023-09-01 04:07:42,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 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 04:07:42,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:42,808 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:42,808 INFO L175 Difference]: Start difference. First operand has 78 places, 49 transitions, 396 flow. Second operand 4 states and 476 transitions. [2023-09-01 04:07:42,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 643 flow [2023-09-01 04:07:42,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 627 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-09-01 04:07:42,837 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 443 flow [2023-09-01 04:07:42,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=443, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-09-01 04:07:42,838 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-09-01 04:07:42,838 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 443 flow [2023-09-01 04:07:42,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:42,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:42,838 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 04:07:42,848 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 04:07:43,046 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 04:07:43,046 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:43,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash -939732847, now seen corresponding path program 2 times [2023-09-01 04:07:43,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:43,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449292821] [2023-09-01 04:07:43,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:07:43,047 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 04:07:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:43,048 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 04:07:43,050 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 04:07:43,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:07:43,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 04:07:43,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:43,225 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:43,226 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 04:07:43,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:43,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:43,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449292821] [2023-09-01 04:07:43,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449292821] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:43,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:43,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:07:43,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266506745] [2023-09-01 04:07:43,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:43,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:43,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:07:43,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-09-01 04:07:43,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 443 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:43,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:43,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-09-01 04:07:43,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:43,986 INFO L130 PetriNetUnfolder]: 2414/4632 cut-off events. [2023-09-01 04:07:43,987 INFO L131 PetriNetUnfolder]: For 13305/13305 co-relation queries the response was YES. [2023-09-01 04:07:43,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17573 conditions, 4632 events. 2414/4632 cut-off events. For 13305/13305 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 32367 event pairs, 1026 based on Foata normal form. 54/4686 useless extension candidates. Maximal degree in co-relation 17530. Up to 3133 conditions per place. [2023-09-01 04:07:44,008 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 49 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2023-09-01 04:07:44,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 59 transitions, 589 flow [2023-09-01 04:07:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:07:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:07:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2023-09-01 04:07:44,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421259842519685 [2023-09-01 04:07:44,010 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2023-09-01 04:07:44,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2023-09-01 04:07:44,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:44,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2023-09-01 04:07:44,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:44,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:44,012 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:44,012 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 443 flow. Second operand 4 states and 428 transitions. [2023-09-01 04:07:44,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 59 transitions, 589 flow [2023-09-01 04:07:44,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 59 transitions, 585 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 04:07:44,042 INFO L231 Difference]: Finished difference. Result has 83 places, 51 transitions, 470 flow [2023-09-01 04:07:44,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=470, PETRI_PLACES=83, PETRI_TRANSITIONS=51} [2023-09-01 04:07:44,043 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2023-09-01 04:07:44,043 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 51 transitions, 470 flow [2023-09-01 04:07:44,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:44,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:44,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:44,068 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 04:07:44,250 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 04:07:44,251 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:44,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:44,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1102980900, now seen corresponding path program 1 times [2023-09-01 04:07:44,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:44,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703597984] [2023-09-01 04:07:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:44,252 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 04:07:44,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:44,252 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 04:07:44,255 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 04:07:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:07:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:44,383 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:44,383 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:44,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:45,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:45,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703597984] [2023-09-01 04:07:45,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703597984] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:45,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:45,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:07:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994662033] [2023-09-01 04:07:45,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:45,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 04:07:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 04:07:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-09-01 04:07:47,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 254 [2023-09-01 04:07:47,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 51 transitions, 470 flow. Second operand has 11 states, 11 states have (on average 95.81818181818181) internal successors, (1054), 11 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:47,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:47,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 254 [2023-09-01 04:07:47,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:50,377 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 04:07:51,402 INFO L130 PetriNetUnfolder]: 2354/4530 cut-off events. [2023-09-01 04:07:51,402 INFO L131 PetriNetUnfolder]: For 15935/15935 co-relation queries the response was YES. [2023-09-01 04:07:51,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17821 conditions, 4530 events. 2354/4530 cut-off events. For 15935/15935 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 32064 event pairs, 1668 based on Foata normal form. 20/4550 useless extension candidates. Maximal degree in co-relation 17775. Up to 4296 conditions per place. [2023-09-01 04:07:51,434 INFO L137 encePairwiseOnDemand]: 247/254 looper letters, 99 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2023-09-01 04:07:51,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 949 flow [2023-09-01 04:07:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 04:07:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 04:07:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1116 transitions. [2023-09-01 04:07:51,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994273443092341 [2023-09-01 04:07:51,439 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1116 transitions. [2023-09-01 04:07:51,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1116 transitions. [2023-09-01 04:07:51,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:51,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1116 transitions. [2023-09-01 04:07:51,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 101.45454545454545) internal successors, (1116), 11 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:51,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:51,447 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:51,447 INFO L175 Difference]: Start difference. First operand has 83 places, 51 transitions, 470 flow. Second operand 11 states and 1116 transitions. [2023-09-01 04:07:51,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 949 flow [2023-09-01 04:07:51,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 920 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 04:07:51,496 INFO L231 Difference]: Finished difference. Result has 95 places, 59 transitions, 600 flow [2023-09-01 04:07:51,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=600, PETRI_PLACES=95, PETRI_TRANSITIONS=59} [2023-09-01 04:07:51,497 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 61 predicate places. [2023-09-01 04:07:51,497 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 59 transitions, 600 flow [2023-09-01 04:07:51,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 95.81818181818181) internal successors, (1054), 11 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:51,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:51,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:51,508 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 04:07:51,708 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 04:07:51,709 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:51,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1464220627, now seen corresponding path program 2 times [2023-09-01 04:07:51,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:51,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776904346] [2023-09-01 04:07:51,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:07:51,710 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 04:07:51,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:51,711 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 04:07:51,713 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 04:07:51,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:07:51,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 04:07:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:51,869 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:51,869 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 04:07:51,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:51,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:51,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776904346] [2023-09-01 04:07:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776904346] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:51,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:07:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614624671] [2023-09-01 04:07:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:07:52,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-09-01 04:07:52,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 59 transitions, 600 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:52,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:52,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-09-01 04:07:52,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:52,506 INFO L130 PetriNetUnfolder]: 1854/3672 cut-off events. [2023-09-01 04:07:52,507 INFO L131 PetriNetUnfolder]: For 13461/13461 co-relation queries the response was YES. [2023-09-01 04:07:52,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12915 conditions, 3672 events. 1854/3672 cut-off events. For 13461/13461 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 25949 event pairs, 1376 based on Foata normal form. 322/3994 useless extension candidates. Maximal degree in co-relation 12864. Up to 3659 conditions per place. [2023-09-01 04:07:52,524 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 50 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2023-09-01 04:07:52,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 57 transitions, 680 flow [2023-09-01 04:07:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:07:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:07:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2023-09-01 04:07:52,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41141732283464566 [2023-09-01 04:07:52,526 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 418 transitions. [2023-09-01 04:07:52,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 418 transitions. [2023-09-01 04:07:52,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:52,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 418 transitions. [2023-09-01 04:07:52,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:52,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:52,528 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:52,528 INFO L175 Difference]: Start difference. First operand has 95 places, 59 transitions, 600 flow. Second operand 4 states and 418 transitions. [2023-09-01 04:07:52,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 57 transitions, 680 flow [2023-09-01 04:07:52,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 57 transitions, 604 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-09-01 04:07:52,558 INFO L231 Difference]: Finished difference. Result has 86 places, 57 transitions, 504 flow [2023-09-01 04:07:52,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=504, PETRI_PLACES=86, PETRI_TRANSITIONS=57} [2023-09-01 04:07:52,559 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-09-01 04:07:52,559 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 57 transitions, 504 flow [2023-09-01 04:07:52,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:52,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:52,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:52,566 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 (18)] Forceful destruction successful, exit code 0 [2023-09-01 04:07:52,766 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 04:07:52,766 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:52,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:52,767 INFO L85 PathProgramCache]: Analyzing trace with hash -243629907, now seen corresponding path program 1 times [2023-09-01 04:07:52,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:52,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276857830] [2023-09-01 04:07:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:52,767 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 04:07:52,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:52,768 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 04:07:52,770 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 04:07:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:07:52,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:52,843 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 04:07:52,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:52,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276857830] [2023-09-01 04:07:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276857830] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:52,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:52,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:52,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265094891] [2023-09-01 04:07:52,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:52,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:52,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:52,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:52,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 254 [2023-09-01 04:07:52,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 57 transitions, 504 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:52,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:52,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 254 [2023-09-01 04:07:52,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:53,253 INFO L130 PetriNetUnfolder]: 1854/3629 cut-off events. [2023-09-01 04:07:53,253 INFO L131 PetriNetUnfolder]: For 5992/5992 co-relation queries the response was YES. [2023-09-01 04:07:53,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11698 conditions, 3629 events. 1854/3629 cut-off events. For 5992/5992 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24928 event pairs, 820 based on Foata normal form. 43/3672 useless extension candidates. Maximal degree in co-relation 11654. Up to 2275 conditions per place. [2023-09-01 04:07:53,266 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 55 selfloop transitions, 6 changer transitions 3/64 dead transitions. [2023-09-01 04:07:53,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 64 transitions, 660 flow [2023-09-01 04:07:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-09-01 04:07:53,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540682414698163 [2023-09-01 04:07:53,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-09-01 04:07:53,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-09-01 04:07:53,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:53,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-09-01 04:07:53,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:53,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:53,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:53,279 INFO L175 Difference]: Start difference. First operand has 86 places, 57 transitions, 504 flow. Second operand 3 states and 346 transitions. [2023-09-01 04:07:53,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 64 transitions, 660 flow [2023-09-01 04:07:53,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 64 transitions, 628 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 04:07:53,293 INFO L231 Difference]: Finished difference. Result has 86 places, 56 transitions, 484 flow [2023-09-01 04:07:53,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=86, PETRI_TRANSITIONS=56} [2023-09-01 04:07:53,293 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-09-01 04:07:53,293 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 56 transitions, 484 flow [2023-09-01 04:07:53,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:53,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:53,294 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 04:07:53,315 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 04:07:53,500 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 04:07:53,501 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:07:53,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1369374, now seen corresponding path program 3 times [2023-09-01 04:07:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:07:53,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237871624] [2023-09-01 04:07:53,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:07:53,502 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 04:07:53,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:07:53,502 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 04:07:53,507 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 04:07:53,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 04:07:53,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:07:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:53,711 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:07:53,711 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:07:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:54,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:56,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:07:56,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237871624] [2023-09-01 04:07:56,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237871624] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:56,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:56,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 04:07:56,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764031973] [2023-09-01 04:07:56,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:56,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 04:07:56,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:07:56,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 04:07:56,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 04:08:05,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 254 [2023-09-01 04:08:05,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 56 transitions, 484 flow. Second operand has 24 states, 24 states have (on average 100.0) internal successors, (2400), 24 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:05,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:05,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 254 [2023-09-01 04:08:05,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:08:17,730 INFO L130 PetriNetUnfolder]: 4377/8522 cut-off events. [2023-09-01 04:08:17,731 INFO L131 PetriNetUnfolder]: For 13757/13757 co-relation queries the response was YES. [2023-09-01 04:08:17,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27614 conditions, 8522 events. 4377/8522 cut-off events. For 13757/13757 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 62600 event pairs, 3227 based on Foata normal form. 12/8534 useless extension candidates. Maximal degree in co-relation 27570. Up to 1749 conditions per place. [2023-09-01 04:08:17,772 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 666 selfloop transitions, 24 changer transitions 0/690 dead transitions. [2023-09-01 04:08:17,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 690 transitions, 6336 flow [2023-09-01 04:08:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 04:08:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 04:08:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2687 transitions. [2023-09-01 04:08:17,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407808398950131 [2023-09-01 04:08:17,779 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2687 transitions. [2023-09-01 04:08:17,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2687 transitions. [2023-09-01 04:08:17,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:17,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2687 transitions. [2023-09-01 04:08:17,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 111.95833333333333) internal successors, (2687), 24 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:17,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:17,789 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:17,789 INFO L175 Difference]: Start difference. First operand has 86 places, 56 transitions, 484 flow. Second operand 24 states and 2687 transitions. [2023-09-01 04:08:17,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 690 transitions, 6336 flow [2023-09-01 04:08:17,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 690 transitions, 6132 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-09-01 04:08:17,857 INFO L231 Difference]: Finished difference. Result has 117 places, 69 transitions, 658 flow [2023-09-01 04:08:17,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=658, PETRI_PLACES=117, PETRI_TRANSITIONS=69} [2023-09-01 04:08:17,858 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 83 predicate places. [2023-09-01 04:08:17,858 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 69 transitions, 658 flow [2023-09-01 04:08:17,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.0) internal successors, (2400), 24 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:17,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:17,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:17,866 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 04:08:18,066 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 04:08:18,066 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:08:18,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash -525367571, now seen corresponding path program 1 times [2023-09-01 04:08:18,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:18,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120897370] [2023-09-01 04:08:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:08:18,068 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 04:08:18,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:18,069 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 04:08:18,070 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 04:08:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:08:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:08:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:18,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:18,391 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-09-01 04:08:18,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2023-09-01 04:08:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:18,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120897370] [2023-09-01 04:08:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120897370] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:18,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:18,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2023-09-01 04:08:18,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851160012] [2023-09-01 04:08:18,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:18,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:08:18,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:08:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:08:18,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 254 [2023-09-01 04:08:18,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 69 transitions, 658 flow. Second operand has 8 states, 8 states have (on average 101.125) internal successors, (809), 8 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:18,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:18,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 254 [2023-09-01 04:08:18,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:08:20,082 INFO L130 PetriNetUnfolder]: 7368/14080 cut-off events. [2023-09-01 04:08:20,082 INFO L131 PetriNetUnfolder]: For 18745/18745 co-relation queries the response was YES. [2023-09-01 04:08:20,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44769 conditions, 14080 events. 7368/14080 cut-off events. For 18745/18745 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 111365 event pairs, 1163 based on Foata normal form. 104/14184 useless extension candidates. Maximal degree in co-relation 44713. Up to 5797 conditions per place. [2023-09-01 04:08:20,145 INFO L137 encePairwiseOnDemand]: 249/254 looper letters, 84 selfloop transitions, 19 changer transitions 9/112 dead transitions. [2023-09-01 04:08:20,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 112 transitions, 1141 flow [2023-09-01 04:08:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:08:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:08:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 533 transitions. [2023-09-01 04:08:20,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196850393700787 [2023-09-01 04:08:20,148 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 533 transitions. [2023-09-01 04:08:20,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 533 transitions. [2023-09-01 04:08:20,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:20,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 533 transitions. [2023-09-01 04:08:20,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:20,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:20,150 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:20,151 INFO L175 Difference]: Start difference. First operand has 117 places, 69 transitions, 658 flow. Second operand 5 states and 533 transitions. [2023-09-01 04:08:20,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 112 transitions, 1141 flow [2023-09-01 04:08:20,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 112 transitions, 1093 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-09-01 04:08:20,269 INFO L231 Difference]: Finished difference. Result has 113 places, 80 transitions, 779 flow [2023-09-01 04:08:20,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=779, PETRI_PLACES=113, PETRI_TRANSITIONS=80} [2023-09-01 04:08:20,270 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 79 predicate places. [2023-09-01 04:08:20,270 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 80 transitions, 779 flow [2023-09-01 04:08:20,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.125) internal successors, (809), 8 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:20,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:20,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:20,278 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 04:08:20,475 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 04:08:20,475 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:08:20,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash 763043619, now seen corresponding path program 2 times [2023-09-01 04:08:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:20,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226661542] [2023-09-01 04:08:20,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:08:20,476 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 04:08:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:20,478 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 04:08:20,480 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 04:08:20,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:08:20,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:08:20,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 04:08:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:20,616 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 24 [2023-09-01 04:08:20,653 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 6 treesize of output 5 [2023-09-01 04:08:20,743 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 32 treesize of output 28 [2023-09-01 04:08:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:20,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:21,185 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-09-01 04:08:21,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 490 treesize of output 413 [2023-09-01 04:08:21,263 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-09-01 04:08:21,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 104 [2023-09-01 04:08:21,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 04:08:21,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 28 [2023-09-01 04:08:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:21,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226661542] [2023-09-01 04:08:21,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226661542] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:21,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:21,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 04:08:21,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189765342] [2023-09-01 04:08:21,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:21,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 04:08:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 04:08:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=80, Unknown=2, NotChecked=0, Total=110 [2023-09-01 04:08:22,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 254 [2023-09-01 04:08:22,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 80 transitions, 779 flow. Second operand has 11 states, 11 states have (on average 86.45454545454545) internal successors, (951), 11 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:22,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:22,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 254 [2023-09-01 04:08:22,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:08:24,300 INFO L130 PetriNetUnfolder]: 7368/13976 cut-off events. [2023-09-01 04:08:24,300 INFO L131 PetriNetUnfolder]: For 26113/26113 co-relation queries the response was YES. [2023-09-01 04:08:24,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48420 conditions, 13976 events. 7368/13976 cut-off events. For 26113/26113 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 109408 event pairs, 1868 based on Foata normal form. 104/14080 useless extension candidates. Maximal degree in co-relation 48361. Up to 5756 conditions per place. [2023-09-01 04:08:24,372 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 70 selfloop transitions, 23 changer transitions 9/102 dead transitions. [2023-09-01 04:08:24,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 102 transitions, 1061 flow [2023-09-01 04:08:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:08:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:08:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 462 transitions. [2023-09-01 04:08:24,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3637795275590551 [2023-09-01 04:08:24,380 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 462 transitions. [2023-09-01 04:08:24,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 462 transitions. [2023-09-01 04:08:24,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:24,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 462 transitions. [2023-09-01 04:08:24,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:24,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:24,397 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:24,397 INFO L175 Difference]: Start difference. First operand has 113 places, 80 transitions, 779 flow. Second operand 5 states and 462 transitions. [2023-09-01 04:08:24,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 102 transitions, 1061 flow [2023-09-01 04:08:24,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 102 transitions, 1047 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:08:24,588 INFO L231 Difference]: Finished difference. Result has 116 places, 80 transitions, 833 flow [2023-09-01 04:08:24,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=833, PETRI_PLACES=116, PETRI_TRANSITIONS=80} [2023-09-01 04:08:24,589 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 82 predicate places. [2023-09-01 04:08:24,589 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 80 transitions, 833 flow [2023-09-01 04:08:24,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.45454545454545) internal successors, (951), 11 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:24,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:24,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:24,597 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 04:08:24,797 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 04:08:24,797 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:08:24,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash -428624670, now seen corresponding path program 3 times [2023-09-01 04:08:24,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:24,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500078564] [2023-09-01 04:08:24,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:08:24,799 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 04:08:24,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:24,799 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 04:08:24,800 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 04:08:24,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:08:24,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:08:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 04:08:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:24,974 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:08:24,974 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:08:24,999 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 13 treesize of output 9 [2023-09-01 04:08:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:25,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:25,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:25,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500078564] [2023-09-01 04:08:25,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500078564] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:25,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:25,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-09-01 04:08:25,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352404460] [2023-09-01 04:08:25,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:25,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 04:08:25,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:25,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 04:08:25,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-09-01 04:08:25,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 254 [2023-09-01 04:08:25,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 80 transitions, 833 flow. Second operand has 11 states, 11 states have (on average 96.45454545454545) internal successors, (1061), 11 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:25,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:25,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 254 [2023-09-01 04:08:25,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:08:27,548 INFO L130 PetriNetUnfolder]: 7196/13656 cut-off events. [2023-09-01 04:08:27,549 INFO L131 PetriNetUnfolder]: For 40134/40134 co-relation queries the response was YES. [2023-09-01 04:08:27,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49361 conditions, 13656 events. 7196/13656 cut-off events. For 40134/40134 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 105862 event pairs, 5098 based on Foata normal form. 8/13664 useless extension candidates. Maximal degree in co-relation 49301. Up to 13524 conditions per place. [2023-09-01 04:08:27,609 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 66 selfloop transitions, 4 changer transitions 27/97 dead transitions. [2023-09-01 04:08:27,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 97 transitions, 1000 flow [2023-09-01 04:08:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 04:08:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 04:08:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 797 transitions. [2023-09-01 04:08:27,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922244094488189 [2023-09-01 04:08:27,612 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 797 transitions. [2023-09-01 04:08:27,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 797 transitions. [2023-09-01 04:08:27,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:27,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 797 transitions. [2023-09-01 04:08:27,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 99.625) internal successors, (797), 8 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:27,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 254.0) internal successors, (2286), 9 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:27,614 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 254.0) internal successors, (2286), 9 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:27,614 INFO L175 Difference]: Start difference. First operand has 116 places, 80 transitions, 833 flow. Second operand 8 states and 797 transitions. [2023-09-01 04:08:27,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 97 transitions, 1000 flow [2023-09-01 04:08:27,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 97 transitions, 944 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-09-01 04:08:27,793 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 640 flow [2023-09-01 04:08:27,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=640, PETRI_PLACES=114, PETRI_TRANSITIONS=70} [2023-09-01 04:08:27,793 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 80 predicate places. [2023-09-01 04:08:27,793 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 640 flow [2023-09-01 04:08:27,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 96.45454545454545) internal successors, (1061), 11 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:27,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:27,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:27,803 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 04:08:28,001 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 04:08:28,001 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:08:28,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1744550133, now seen corresponding path program 4 times [2023-09-01 04:08:28,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:28,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101160713] [2023-09-01 04:08:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:08:28,002 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 04:08:28,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:28,003 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 04:08:28,043 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 04:08:28,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:08:28,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:08:28,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 04:08:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:28,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:28,426 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2023-09-01 04:08:28,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 25 [2023-09-01 04:08:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:08:28,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:28,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101160713] [2023-09-01 04:08:28,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101160713] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:28,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:28,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2023-09-01 04:08:28,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660103686] [2023-09-01 04:08:28,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:28,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 04:08:28,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 04:08:28,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-09-01 04:08:28,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-09-01 04:08:28,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 70 transitions, 640 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:28,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:28,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-09-01 04:08:28,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:08:31,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:08:33,474 WARN L539 Checker$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 04:08:36,079 INFO L130 PetriNetUnfolder]: 10782/20186 cut-off events. [2023-09-01 04:08:36,079 INFO L131 PetriNetUnfolder]: For 35539/35539 co-relation queries the response was YES. [2023-09-01 04:08:36,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68037 conditions, 20186 events. 10782/20186 cut-off events. For 35539/35539 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 166619 event pairs, 940 based on Foata normal form. 20/20206 useless extension candidates. Maximal degree in co-relation 67980. Up to 4801 conditions per place. [2023-09-01 04:08:36,292 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 128 selfloop transitions, 38 changer transitions 34/200 dead transitions. [2023-09-01 04:08:36,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 200 transitions, 1567 flow [2023-09-01 04:08:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 04:08:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 04:08:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1874 transitions. [2023-09-01 04:08:36,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098862642169729 [2023-09-01 04:08:36,296 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1874 transitions. [2023-09-01 04:08:36,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1874 transitions. [2023-09-01 04:08:36,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:36,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1874 transitions. [2023-09-01 04:08:36,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.11111111111111) internal successors, (1874), 18 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:36,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 254.0) internal successors, (4826), 19 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:36,302 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 254.0) internal successors, (4826), 19 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:36,302 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 640 flow. Second operand 18 states and 1874 transitions. [2023-09-01 04:08:36,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 200 transitions, 1567 flow [2023-09-01 04:08:36,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 200 transitions, 1546 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-09-01 04:08:36,869 INFO L231 Difference]: Finished difference. Result has 121 places, 85 transitions, 865 flow [2023-09-01 04:08:36,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=865, PETRI_PLACES=121, PETRI_TRANSITIONS=85} [2023-09-01 04:08:36,870 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 87 predicate places. [2023-09-01 04:08:36,870 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 85 transitions, 865 flow [2023-09-01 04:08:36,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:36,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:36,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:36,882 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 04:08:37,081 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 04:08:37,082 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:08:37,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:37,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1277513211, now seen corresponding path program 5 times [2023-09-01 04:08:37,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:37,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208070478] [2023-09-01 04:08:37,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 04:08:37,083 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 04:08:37,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:37,084 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 04:08:37,085 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 04:08:37,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 04:08:37,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:08:37,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 04:08:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:37,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:37,452 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-09-01 04:08:37,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2023-09-01 04:08:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 04:08:37,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:37,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208070478] [2023-09-01 04:08:37,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208070478] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:37,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:37,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2023-09-01 04:08:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82609387] [2023-09-01 04:08:37,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:37,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:08:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:08:37,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:08:37,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-09-01 04:08:37,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 85 transitions, 865 flow. Second operand has 12 states, 12 states have (on average 98.41666666666667) internal successors, (1181), 12 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:37,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:37,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-09-01 04:08:37,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:08:40,612 INFO L130 PetriNetUnfolder]: 10782/20106 cut-off events. [2023-09-01 04:08:40,613 INFO L131 PetriNetUnfolder]: For 50358/50358 co-relation queries the response was YES. [2023-09-01 04:08:40,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72215 conditions, 20106 events. 10782/20106 cut-off events. For 50358/50358 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 164725 event pairs, 1020 based on Foata normal form. 80/20186 useless extension candidates. Maximal degree in co-relation 72159. Up to 6020 conditions per place. [2023-09-01 04:08:40,838 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 88 selfloop transitions, 34 changer transitions 53/175 dead transitions. [2023-09-01 04:08:40,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 1473 flow [2023-09-01 04:08:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 04:08:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 04:08:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1663 transitions. [2023-09-01 04:08:40,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092027559055118 [2023-09-01 04:08:40,841 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1663 transitions. [2023-09-01 04:08:40,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1663 transitions. [2023-09-01 04:08:40,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:40,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1663 transitions. [2023-09-01 04:08:40,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 103.9375) internal successors, (1663), 16 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:40,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:40,846 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:40,846 INFO L175 Difference]: Start difference. First operand has 121 places, 85 transitions, 865 flow. Second operand 16 states and 1663 transitions. [2023-09-01 04:08:40,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 1473 flow [2023-09-01 04:08:41,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 175 transitions, 1381 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-09-01 04:08:41,535 INFO L231 Difference]: Finished difference. Result has 132 places, 85 transitions, 881 flow [2023-09-01 04:08:41,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=881, PETRI_PLACES=132, PETRI_TRANSITIONS=85} [2023-09-01 04:08:41,536 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 98 predicate places. [2023-09-01 04:08:41,536 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 85 transitions, 881 flow [2023-09-01 04:08:41,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.41666666666667) internal successors, (1181), 12 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:41,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:41,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:41,549 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 (25)] Ended with exit code 0 [2023-09-01 04:08:41,751 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 04:08:41,752 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:08:41,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2060183985, now seen corresponding path program 6 times [2023-09-01 04:08:41,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:41,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044139451] [2023-09-01 04:08:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 04:08:41,753 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 04:08:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:41,754 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 04:08:41,757 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 04:08:41,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 04:08:41,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:08:41,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 04:08:41,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:41,932 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 42 treesize of output 38 [2023-09-01 04:08:41,985 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 6 treesize of output 5 [2023-09-01 04:08:42,061 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 32 treesize of output 28 [2023-09-01 04:08:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:08:42,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:42,233 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2023-09-01 04:08:42,733 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-09-01 04:08:42,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 500 treesize of output 420 [2023-09-01 04:08:42,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 04:08:42,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 28 [2023-09-01 04:08:42,814 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-09-01 04:08:42,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 104 [2023-09-01 04:08:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-09-01 04:08:43,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:43,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044139451] [2023-09-01 04:08:43,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044139451] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:43,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:43,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-09-01 04:08:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730555143] [2023-09-01 04:08:43,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 04:08:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:43,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 04:08:43,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2023-09-01 04:08:43,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 254 [2023-09-01 04:08:43,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 85 transitions, 881 flow. Second operand has 16 states, 16 states have (on average 79.0) internal successors, (1264), 16 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:43,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:43,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 254 [2023-09-01 04:08:43,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:08:44,718 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (select |c_#memory_int| c_~queue~0.base)) (.cse2 (bvmul (_ bv4 32) c_~size~0)) (.cse0 (forall ((v_ArrVal_592 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~queue~0.base))) (concat (concat (concat (select .cse4 (bvadd c_~queue~0.offset .cse3 (_ bv7 32))) (select .cse4 (bvadd c_~queue~0.offset (_ bv6 32) .cse3))) (select .cse4 (bvadd c_~queue~0.offset .cse3 (_ bv5 32)))) (select .cse4 (bvadd c_~queue~0.offset (_ bv4 32) .cse3)))) (_ bv5 32))))) (and (or .cse0 (not (= (concat (concat (concat (select .cse1 (bvadd c_~queue~0.offset (_ bv3 32) .cse2 .cse3)) (select .cse1 (bvadd c_~queue~0.offset (_ bv2 32) .cse2 .cse3))) (select .cse1 (bvadd c_~queue~0.offset .cse2 .cse3 (_ bv1 32)))) (select .cse1 (bvadd c_~queue~0.offset .cse2 .cse3))) (_ bv5 32)))) .cse0 (or (not (= (concat (concat (concat (select .cse1 (bvadd c_~queue~0.offset .cse2 .cse3 (_ bv7 32))) (select .cse1 (bvadd c_~queue~0.offset (_ bv6 32) .cse2 .cse3))) (select .cse1 (bvadd c_~queue~0.offset .cse2 .cse3 (_ bv5 32)))) (select .cse1 (bvadd c_~queue~0.offset (_ bv4 32) .cse2 .cse3))) (_ bv5 32))) .cse0) (= c_~x~0 (_ bv5 32))))) is different from false [2023-09-01 04:08:47,899 INFO L130 PetriNetUnfolder]: 13022/24366 cut-off events. [2023-09-01 04:08:47,900 INFO L131 PetriNetUnfolder]: For 63718/63718 co-relation queries the response was YES. [2023-09-01 04:08:47,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88337 conditions, 24366 events. 13022/24366 cut-off events. For 63718/63718 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 205785 event pairs, 1820 based on Foata normal form. 20/24386 useless extension candidates. Maximal degree in co-relation 88279. Up to 6241 conditions per place. [2023-09-01 04:08:48,018 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 85 selfloop transitions, 50 changer transitions 34/169 dead transitions. [2023-09-01 04:08:48,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 169 transitions, 1574 flow [2023-09-01 04:08:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 04:08:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 04:08:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1262 transitions. [2023-09-01 04:08:48,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312335958005249 [2023-09-01 04:08:48,021 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1262 transitions. [2023-09-01 04:08:48,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1262 transitions. [2023-09-01 04:08:48,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:48,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1262 transitions. [2023-09-01 04:08:48,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.13333333333334) internal successors, (1262), 15 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:48,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 254.0) internal successors, (4064), 16 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:48,025 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 254.0) internal successors, (4064), 16 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:48,025 INFO L175 Difference]: Start difference. First operand has 132 places, 85 transitions, 881 flow. Second operand 15 states and 1262 transitions. [2023-09-01 04:08:48,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 169 transitions, 1574 flow [2023-09-01 04:08:48,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 169 transitions, 1503 flow, removed 5 selfloop flow, removed 12 redundant places. [2023-09-01 04:08:48,779 INFO L231 Difference]: Finished difference. Result has 140 places, 104 transitions, 1149 flow [2023-09-01 04:08:48,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1149, PETRI_PLACES=140, PETRI_TRANSITIONS=104} [2023-09-01 04:08:48,780 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 106 predicate places. [2023-09-01 04:08:48,780 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 104 transitions, 1149 flow [2023-09-01 04:08:48,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 79.0) internal successors, (1264), 16 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:48,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:48,781 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:48,790 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 04:08:48,993 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 04:08:48,993 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:08:48,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash -414874438, now seen corresponding path program 7 times [2023-09-01 04:08:48,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:48,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885078263] [2023-09-01 04:08:48,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 04:08:48,994 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 04:08:48,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:48,996 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 04:08:48,997 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 04:08:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:08:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:08:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:08:49,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:08:49,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885078263] [2023-09-01 04:08:49,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885078263] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:49,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:49,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 04:08:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378114064] [2023-09-01 04:08:49,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:08:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:08:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:08:49,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-09-01 04:08:49,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 104 transitions, 1149 flow. Second operand has 8 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:49,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:49,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-09-01 04:08:49,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:08:53,353 INFO L130 PetriNetUnfolder]: 17182/32446 cut-off events. [2023-09-01 04:08:53,354 INFO L131 PetriNetUnfolder]: For 155418/155418 co-relation queries the response was YES. [2023-09-01 04:08:53,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165943 conditions, 32446 events. 17182/32446 cut-off events. For 155418/155418 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 290087 event pairs, 3520 based on Foata normal form. 480/32926 useless extension candidates. Maximal degree in co-relation 165879. Up to 18061 conditions per place. [2023-09-01 04:08:53,589 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 94 selfloop transitions, 46 changer transitions 5/145 dead transitions. [2023-09-01 04:08:53,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 145 transitions, 1809 flow [2023-09-01 04:08:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:08:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:08:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-09-01 04:08:53,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637795275590551 [2023-09-01 04:08:53,592 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-09-01 04:08:53,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-09-01 04:08:53,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:53,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-09-01 04:08:53,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:53,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:53,594 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:53,594 INFO L175 Difference]: Start difference. First operand has 140 places, 104 transitions, 1149 flow. Second operand 5 states and 589 transitions. [2023-09-01 04:08:53,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 145 transitions, 1809 flow [2023-09-01 04:08:55,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 145 transitions, 1737 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-09-01 04:08:55,323 INFO L231 Difference]: Finished difference. Result has 139 places, 115 transitions, 1363 flow [2023-09-01 04:08:55,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1363, PETRI_PLACES=139, PETRI_TRANSITIONS=115} [2023-09-01 04:08:55,323 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 105 predicate places. [2023-09-01 04:08:55,323 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 115 transitions, 1363 flow [2023-09-01 04:08:55,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:55,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:55,324 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:55,334 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 (27)] Ended with exit code 0 [2023-09-01 04:08:55,533 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 04:08:55,534 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:08:55,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -29306486, now seen corresponding path program 8 times [2023-09-01 04:08:55,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:55,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92063415] [2023-09-01 04:08:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:08:55,535 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 04:08:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:55,553 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 04:08:55,558 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 04:08:55,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:08:55,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:08:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:08:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:55,792 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:08:55,792 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:08:55,875 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 13 treesize of output 9 [2023-09-01 04:08:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:08:56,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:08:56,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92063415] [2023-09-01 04:08:56,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92063415] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:56,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:56,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-09-01 04:08:56,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127027292] [2023-09-01 04:08:56,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:56,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 04:08:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 04:08:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-09-01 04:08:57,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 254 [2023-09-01 04:08:57,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 115 transitions, 1363 flow. Second operand has 15 states, 15 states have (on average 96.0) internal successors, (1440), 15 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:57,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:57,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 254 [2023-09-01 04:08:57,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:09:06,853 INFO L130 PetriNetUnfolder]: 16286/30863 cut-off events. [2023-09-01 04:09:06,854 INFO L131 PetriNetUnfolder]: For 151788/151788 co-relation queries the response was YES. [2023-09-01 04:09:07,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166002 conditions, 30863 events. 16286/30863 cut-off events. For 151788/151788 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 275284 event pairs, 10770 based on Foata normal form. 48/30911 useless extension candidates. Maximal degree in co-relation 165936. Up to 30442 conditions per place. [2023-09-01 04:09:07,258 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 109 selfloop transitions, 5 changer transitions 59/173 dead transitions. [2023-09-01 04:09:07,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 173 transitions, 2137 flow [2023-09-01 04:09:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:09:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:09:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1201 transitions. [2023-09-01 04:09:07,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3940288713910761 [2023-09-01 04:09:07,263 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1201 transitions. [2023-09-01 04:09:07,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1201 transitions. [2023-09-01 04:09:07,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:09:07,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1201 transitions. [2023-09-01 04:09:07,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.08333333333333) internal successors, (1201), 12 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:07,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:07,272 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:07,272 INFO L175 Difference]: Start difference. First operand has 139 places, 115 transitions, 1363 flow. Second operand 12 states and 1201 transitions. [2023-09-01 04:09:07,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 173 transitions, 2137 flow [2023-09-01 04:09:10,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 173 transitions, 2071 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-09-01 04:09:10,027 INFO L231 Difference]: Finished difference. Result has 154 places, 114 transitions, 1368 flow [2023-09-01 04:09:10,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1368, PETRI_PLACES=154, PETRI_TRANSITIONS=114} [2023-09-01 04:09:10,027 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 120 predicate places. [2023-09-01 04:09:10,028 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 114 transitions, 1368 flow [2023-09-01 04:09:10,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 96.0) internal successors, (1440), 15 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:10,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:09:10,028 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:09:10,037 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 04:09:10,231 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 04:09:10,231 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:09:10,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:09:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash 650034979, now seen corresponding path program 9 times [2023-09-01 04:09:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:09:10,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605950322] [2023-09-01 04:09:10,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:09:10,232 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 04:09:10,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:09:10,233 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 04:09:10,235 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 04:09:10,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 04:09:10,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:09:10,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 04:09:10,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:09:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:09:10,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:09:10,767 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2023-09-01 04:09:10,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 25 [2023-09-01 04:09:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 04:09:10,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:09:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605950322] [2023-09-01 04:09:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605950322] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:09:10,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:09:10,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2023-09-01 04:09:10,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228226352] [2023-09-01 04:09:10,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:09:10,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 04:09:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:09:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 04:09:10,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-09-01 04:09:11,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-09-01 04:09:11,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 114 transitions, 1368 flow. Second operand has 17 states, 17 states have (on average 98.11764705882354) internal successors, (1668), 17 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:11,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:09:11,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-09-01 04:09:11,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:09:14,231 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 04:09:16,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:09:18,425 WARN L539 Checker$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 04:09:20,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:09:22,553 WARN L539 Checker$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 04:09:24,604 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 04:09:30,652 INFO L130 PetriNetUnfolder]: 21947/41123 cut-off events. [2023-09-01 04:09:30,652 INFO L131 PetriNetUnfolder]: For 144181/144181 co-relation queries the response was YES. [2023-09-01 04:09:31,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197339 conditions, 41123 events. 21947/41123 cut-off events. For 144181/144181 co-relation queries the response was YES. Maximal size of possible extension queue 1037. Compared 375537 event pairs, 1007 based on Foata normal form. 19/41142 useless extension candidates. Maximal degree in co-relation 197266. Up to 23485 conditions per place. [2023-09-01 04:09:31,147 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 197 selfloop transitions, 98 changer transitions 79/374 dead transitions. [2023-09-01 04:09:31,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 374 transitions, 3657 flow [2023-09-01 04:09:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 04:09:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 04:09:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3649 transitions. [2023-09-01 04:09:31,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41046119235095613 [2023-09-01 04:09:31,153 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3649 transitions. [2023-09-01 04:09:31,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3649 transitions. [2023-09-01 04:09:31,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:09:31,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3649 transitions. [2023-09-01 04:09:31,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 104.25714285714285) internal successors, (3649), 35 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:31,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 254.0) internal successors, (9144), 36 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:31,163 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 254.0) internal successors, (9144), 36 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:31,164 INFO L175 Difference]: Start difference. First operand has 154 places, 114 transitions, 1368 flow. Second operand 35 states and 3649 transitions. [2023-09-01 04:09:31,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 374 transitions, 3657 flow [2023-09-01 04:09:33,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 374 transitions, 3589 flow, removed 25 selfloop flow, removed 13 redundant places. [2023-09-01 04:09:33,706 INFO L231 Difference]: Finished difference. Result has 170 places, 144 transitions, 1876 flow [2023-09-01 04:09:33,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1876, PETRI_PLACES=170, PETRI_TRANSITIONS=144} [2023-09-01 04:09:33,707 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 136 predicate places. [2023-09-01 04:09:33,708 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 144 transitions, 1876 flow [2023-09-01 04:09:33,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.11764705882354) internal successors, (1668), 17 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:33,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:09:33,708 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:09:33,721 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 04:09:33,919 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 04:09:33,919 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:09:33,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:09:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash -974346077, now seen corresponding path program 10 times [2023-09-01 04:09:33,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:09:33,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43948627] [2023-09-01 04:09:33,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:09:33,920 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 04:09:33,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:09:33,921 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 04:09:33,923 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 04:09:34,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:09:34,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:09:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:09:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:09:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:09:34,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:09:34,381 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2023-09-01 04:09:34,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 25 [2023-09-01 04:09:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 04:09:34,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:09:34,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43948627] [2023-09-01 04:09:34,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43948627] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:09:34,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:09:34,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2023-09-01 04:09:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246518588] [2023-09-01 04:09:34,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:09:34,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 04:09:34,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:09:34,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 04:09:34,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-09-01 04:09:34,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-09-01 04:09:34,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 144 transitions, 1876 flow. Second operand has 17 states, 17 states have (on average 98.0) internal successors, (1666), 17 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:34,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:09:34,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-09-01 04:09:34,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:09:37,654 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 04:09:39,725 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 04:09:47,468 INFO L130 PetriNetUnfolder]: 27913/52067 cut-off events. [2023-09-01 04:09:47,468 INFO L131 PetriNetUnfolder]: For 219740/219740 co-relation queries the response was YES. [2023-09-01 04:09:47,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260862 conditions, 52067 events. 27913/52067 cut-off events. For 219740/219740 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 489046 event pairs, 1596 based on Foata normal form. 171/52238 useless extension candidates. Maximal degree in co-relation 260797. Up to 30325 conditions per place. [2023-09-01 04:09:48,021 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 203 selfloop transitions, 126 changer transitions 121/450 dead transitions. [2023-09-01 04:09:48,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 450 transitions, 4624 flow [2023-09-01 04:09:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 04:09:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 04:09:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4587 transitions. [2023-09-01 04:09:48,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4104330708661417 [2023-09-01 04:09:48,028 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4587 transitions. [2023-09-01 04:09:48,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4587 transitions. [2023-09-01 04:09:48,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:09:48,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4587 transitions. [2023-09-01 04:09:48,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 104.25) internal successors, (4587), 44 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:48,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 254.0) internal successors, (11430), 45 states have internal predecessors, (11430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:48,038 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 254.0) internal successors, (11430), 45 states have internal predecessors, (11430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:48,039 INFO L175 Difference]: Start difference. First operand has 170 places, 144 transitions, 1876 flow. Second operand 44 states and 4587 transitions. [2023-09-01 04:09:48,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 450 transitions, 4624 flow [2023-09-01 04:09:50,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 450 transitions, 4282 flow, removed 49 selfloop flow, removed 14 redundant places. [2023-09-01 04:09:50,911 INFO L231 Difference]: Finished difference. Result has 208 places, 174 transitions, 2333 flow [2023-09-01 04:09:50,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2333, PETRI_PLACES=208, PETRI_TRANSITIONS=174} [2023-09-01 04:09:50,912 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 174 predicate places. [2023-09-01 04:09:50,912 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 174 transitions, 2333 flow [2023-09-01 04:09:50,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.0) internal successors, (1666), 17 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:50,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:09:50,913 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:09:50,923 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 (30)] Forceful destruction successful, exit code 0 [2023-09-01 04:09:51,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /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 04:09:51,121 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:09:51,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:09:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash -576138963, now seen corresponding path program 11 times [2023-09-01 04:09:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:09:51,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339598769] [2023-09-01 04:09:51,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 04:09:51,122 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 04:09:51,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:09:51,123 INFO L229 MonitoredProcess]: Starting monitored process 31 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 04:09:51,125 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 (31)] Waiting until timeout for monitored process [2023-09-01 04:09:51,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 04:09:51,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:09:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 04:09:51,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:09:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:09:51,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:09:51,568 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-09-01 04:09:51,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2023-09-01 04:09:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 04:09:51,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:09:51,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339598769] [2023-09-01 04:09:51,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339598769] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:09:51,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:09:51,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2023-09-01 04:09:51,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007652097] [2023-09-01 04:09:51,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:09:51,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 04:09:51,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:09:51,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 04:09:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-09-01 04:09:52,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-09-01 04:09:52,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 174 transitions, 2333 flow. Second operand has 18 states, 18 states have (on average 97.88888888888889) internal successors, (1762), 18 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:09:52,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:09:52,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-09-01 04:09:52,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:10:01,894 INFO L130 PetriNetUnfolder]: 28407/52903 cut-off events. [2023-09-01 04:10:01,895 INFO L131 PetriNetUnfolder]: For 250539/250539 co-relation queries the response was YES. [2023-09-01 04:10:02,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264309 conditions, 52903 events. 28407/52903 cut-off events. For 250539/250539 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 498877 event pairs, 2337 based on Foata normal form. 190/53093 useless extension candidates. Maximal degree in co-relation 264237. Up to 31009 conditions per place. [2023-09-01 04:10:02,805 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 118 selfloop transitions, 119 changer transitions 128/365 dead transitions. [2023-09-01 04:10:02,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 365 transitions, 3981 flow [2023-09-01 04:10:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 04:10:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 04:10:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3326 transitions. [2023-09-01 04:10:02,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092027559055118 [2023-09-01 04:10:02,813 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3326 transitions. [2023-09-01 04:10:02,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3326 transitions. [2023-09-01 04:10:02,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:10:02,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3326 transitions. [2023-09-01 04:10:02,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 103.9375) internal successors, (3326), 32 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:02,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 254.0) internal successors, (8382), 33 states have internal predecessors, (8382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:02,821 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 254.0) internal successors, (8382), 33 states have internal predecessors, (8382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:02,821 INFO L175 Difference]: Start difference. First operand has 208 places, 174 transitions, 2333 flow. Second operand 32 states and 3326 transitions. [2023-09-01 04:10:02,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 365 transitions, 3981 flow [2023-09-01 04:10:06,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 365 transitions, 3779 flow, removed 59 selfloop flow, removed 19 redundant places. [2023-09-01 04:10:06,529 INFO L231 Difference]: Finished difference. Result has 229 places, 182 transitions, 2591 flow [2023-09-01 04:10:06,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2591, PETRI_PLACES=229, PETRI_TRANSITIONS=182} [2023-09-01 04:10:06,529 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 195 predicate places. [2023-09-01 04:10:06,530 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 182 transitions, 2591 flow [2023-09-01 04:10:06,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 97.88888888888889) internal successors, (1762), 18 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:06,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:10:06,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:10:06,583 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 (31)] Forceful destruction successful, exit code 0 [2023-09-01 04:10:06,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /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 04:10:06,739 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:10:06,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:10:06,739 INFO L85 PathProgramCache]: Analyzing trace with hash 88733859, now seen corresponding path program 12 times [2023-09-01 04:10:06,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:10:06,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730364880] [2023-09-01 04:10:06,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 04:10:06,739 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 04:10:06,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:10:06,740 INFO L229 MonitoredProcess]: Starting monitored process 32 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 04:10:06,742 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 (32)] Waiting until timeout for monitored process [2023-09-01 04:10:06,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 04:10:06,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:10:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 04:10:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:10:06,990 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 14 treesize of output 12 [2023-09-01 04:10:07,152 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 32 treesize of output 28 [2023-09-01 04:10:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:10:07,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:10:07,411 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_795 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_795) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse1)))) (_ bv5 32))) is different from false [2023-09-01 04:10:07,493 INFO L321 Elim1Store]: treesize reduction 120, result has 25.5 percent of original size [2023-09-01 04:10:07,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 106 [2023-09-01 04:10:07,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 04:10:07,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2023-09-01 04:10:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-09-01 04:10:07,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:10:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730364880] [2023-09-01 04:10:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730364880] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:10:07,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:10:07,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2023-09-01 04:10:07,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661763941] [2023-09-01 04:10:07,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:10:07,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 04:10:07,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:10:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 04:10:07,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=331, Unknown=1, NotChecked=36, Total=420 [2023-09-01 04:10:07,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 254 [2023-09-01 04:10:07,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 182 transitions, 2591 flow. Second operand has 21 states, 21 states have (on average 78.76190476190476) internal successors, (1654), 21 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:07,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:10:07,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 254 [2023-09-01 04:10:07,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:10:10,795 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 04:10:12,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:10:15,107 WARN L539 Checker$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 04:10:17,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:10:19,459 WARN L539 Checker$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 04:10:21,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:10:24,062 WARN L539 Checker$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 04:10:26,365 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 04:10:36,589 INFO L130 PetriNetUnfolder]: 36273/66070 cut-off events. [2023-09-01 04:10:36,590 INFO L131 PetriNetUnfolder]: For 356160/356160 co-relation queries the response was YES. [2023-09-01 04:10:37,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339367 conditions, 66070 events. 36273/66070 cut-off events. For 356160/356160 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 621897 event pairs, 2698 based on Foata normal form. 19/66089 useless extension candidates. Maximal degree in co-relation 339287. Up to 39521 conditions per place. [2023-09-01 04:10:37,833 INFO L137 encePairwiseOnDemand]: 244/254 looper letters, 136 selfloop transitions, 168 changer transitions 81/385 dead transitions. [2023-09-01 04:10:37,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 385 transitions, 4790 flow [2023-09-01 04:10:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 04:10:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 04:10:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2535 transitions. [2023-09-01 04:10:37,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33267716535433073 [2023-09-01 04:10:37,836 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2535 transitions. [2023-09-01 04:10:37,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2535 transitions. [2023-09-01 04:10:37,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:10:37,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2535 transitions. [2023-09-01 04:10:37,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 84.5) internal successors, (2535), 30 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:37,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 254.0) internal successors, (7874), 31 states have internal predecessors, (7874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:37,854 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 254.0) internal successors, (7874), 31 states have internal predecessors, (7874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:37,854 INFO L175 Difference]: Start difference. First operand has 229 places, 182 transitions, 2591 flow. Second operand 30 states and 2535 transitions. [2023-09-01 04:10:37,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 385 transitions, 4790 flow [2023-09-01 04:10:43,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 385 transitions, 4465 flow, removed 44 selfloop flow, removed 22 redundant places. [2023-09-01 04:10:43,913 INFO L231 Difference]: Finished difference. Result has 243 places, 229 transitions, 3459 flow [2023-09-01 04:10:43,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3459, PETRI_PLACES=243, PETRI_TRANSITIONS=229} [2023-09-01 04:10:43,914 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 209 predicate places. [2023-09-01 04:10:43,914 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 229 transitions, 3459 flow [2023-09-01 04:10:43,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 78.76190476190476) internal successors, (1654), 21 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:43,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:10:43,914 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:10:43,926 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 (32)] Forceful destruction successful, exit code 0 [2023-09-01 04:10:44,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /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 04:10:44,117 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:10:44,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:10:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash -561553336, now seen corresponding path program 13 times [2023-09-01 04:10:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:10:44,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653972054] [2023-09-01 04:10:44,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 04:10:44,120 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 04:10:44,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:10:44,123 INFO L229 MonitoredProcess]: Starting monitored process 33 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 04:10:44,124 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 (33)] Waiting until timeout for monitored process [2023-09-01 04:10:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:10:44,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:10:44,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:10:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 04:10:44,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:10:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 04:10:44,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:10:44,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653972054] [2023-09-01 04:10:44,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653972054] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:10:44,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:10:44,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 04:10:44,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676355041] [2023-09-01 04:10:44,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:10:44,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:10:44,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:10:44,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:10:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:10:44,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-09-01 04:10:44,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 229 transitions, 3459 flow. Second operand has 10 states, 10 states have (on average 111.7) internal successors, (1117), 10 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:44,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:10:44,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-09-01 04:10:44,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:11:06,590 INFO L130 PetriNetUnfolder]: 56945/106331 cut-off events. [2023-09-01 04:11:06,590 INFO L131 PetriNetUnfolder]: For 1147434/1147434 co-relation queries the response was YES. [2023-09-01 04:11:08,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744984 conditions, 106331 events. 56945/106331 cut-off events. For 1147434/1147434 co-relation queries the response was YES. Maximal size of possible extension queue 2655. Compared 1099609 event pairs, 10716 based on Foata normal form. 456/106787 useless extension candidates. Maximal degree in co-relation 744899. Up to 62967 conditions per place. [2023-09-01 04:11:08,660 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 138 selfloop transitions, 204 changer transitions 7/349 dead transitions. [2023-09-01 04:11:08,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 349 transitions, 6209 flow [2023-09-01 04:11:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:11:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:11:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2023-09-01 04:11:08,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645669291338583 [2023-09-01 04:11:08,662 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2023-09-01 04:11:08,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2023-09-01 04:11:08,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:11:08,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2023-09-01 04:11:08,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:11:08,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:11:08,681 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:11:08,681 INFO L175 Difference]: Start difference. First operand has 243 places, 229 transitions, 3459 flow. Second operand 6 states and 708 transitions. [2023-09-01 04:11:08,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 349 transitions, 6209 flow [2023-09-01 04:11:27,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 349 transitions, 5824 flow, removed 85 selfloop flow, removed 14 redundant places. [2023-09-01 04:11:27,775 INFO L231 Difference]: Finished difference. Result has 235 places, 310 transitions, 5195 flow [2023-09-01 04:11:27,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5195, PETRI_PLACES=235, PETRI_TRANSITIONS=310} [2023-09-01 04:11:27,777 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 201 predicate places. [2023-09-01 04:11:27,777 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 310 transitions, 5195 flow [2023-09-01 04:11:27,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.7) internal successors, (1117), 10 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:11:27,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:11:27,778 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:11:27,789 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 (33)] Forceful destruction successful, exit code 0 [2023-09-01 04:11:27,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /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 04:11:27,989 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:11:27,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:11:27,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1865521960, now seen corresponding path program 14 times [2023-09-01 04:11:27,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:11:27,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913365233] [2023-09-01 04:11:27,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:11:27,990 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 04:11:27,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:11:27,991 INFO L229 MonitoredProcess]: Starting monitored process 34 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 04:11:27,994 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 (34)] Waiting until timeout for monitored process [2023-09-01 04:11:28,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:11:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:11:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 04:11:28,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:11:28,316 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:11:28,317 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:11:28,414 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 18 treesize of output 12 [2023-09-01 04:11:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:11:28,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:11:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:11:29,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:11:29,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913365233] [2023-09-01 04:11:29,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913365233] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:11:29,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:11:29,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-09-01 04:11:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021289229] [2023-09-01 04:11:29,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:11:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 04:11:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:11:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 04:11:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-09-01 04:11:31,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 254 [2023-09-01 04:11:31,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 310 transitions, 5195 flow. Second operand has 18 states, 18 states have (on average 97.0) internal successors, (1746), 18 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:11:31,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:11:31,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 254 [2023-09-01 04:11:31,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:11:52,451 INFO L130 PetriNetUnfolder]: 55381/104359 cut-off events. [2023-09-01 04:11:52,451 INFO L131 PetriNetUnfolder]: For 1115262/1115262 co-relation queries the response was YES. [2023-09-01 04:11:54,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756061 conditions, 104359 events. 55381/104359 cut-off events. For 1115262/1115262 co-relation queries the response was YES. Maximal size of possible extension queue 2612. Compared 1090615 event pairs, 34950 based on Foata normal form. 392/104751 useless extension candidates. Maximal degree in co-relation 755976. Up to 99688 conditions per place. [2023-09-01 04:11:54,571 INFO L137 encePairwiseOnDemand]: 249/254 looper letters, 303 selfloop transitions, 6 changer transitions 228/537 dead transitions. [2023-09-01 04:11:54,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 537 transitions, 9951 flow [2023-09-01 04:11:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 04:11:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 04:11:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1101 transitions. [2023-09-01 04:11:54,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3940586972083035 [2023-09-01 04:11:54,574 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1101 transitions. [2023-09-01 04:11:54,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1101 transitions. [2023-09-01 04:11:54,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:11:54,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1101 transitions. [2023-09-01 04:11:54,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 100.0909090909091) internal successors, (1101), 11 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:11:54,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:11:54,577 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:11:54,577 INFO L175 Difference]: Start difference. First operand has 235 places, 310 transitions, 5195 flow. Second operand 11 states and 1101 transitions. [2023-09-01 04:11:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 537 transitions, 9951 flow [2023-09-01 04:12:20,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 537 transitions, 9839 flow, removed 56 selfloop flow, removed 0 redundant places. [2023-09-01 04:12:20,932 INFO L231 Difference]: Finished difference. Result has 249 places, 309 transitions, 5505 flow [2023-09-01 04:12:20,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=5123, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5505, PETRI_PLACES=249, PETRI_TRANSITIONS=309} [2023-09-01 04:12:20,933 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 215 predicate places. [2023-09-01 04:12:20,933 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 309 transitions, 5505 flow [2023-09-01 04:12:20,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 97.0) internal successors, (1746), 18 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:20,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:20,934 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-09-01 04:12:20,944 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 (34)] Ended with exit code 0 [2023-09-01 04:12:21,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /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 04:12:21,142 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:12:21,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2129214174, now seen corresponding path program 4 times [2023-09-01 04:12:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:21,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214120056] [2023-09-01 04:12:21,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:12:21,143 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 04:12:21,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:21,144 INFO L229 MonitoredProcess]: Starting monitored process 35 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 04:12:21,146 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 (35)] Waiting until timeout for monitored process [2023-09-01 04:12:21,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:12:21,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 04:12:21,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:21,369 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:21,370 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:22,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:29,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:29,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214120056] [2023-09-01 04:12:29,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214120056] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:29,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:29,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-09-01 04:12:29,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144051798] [2023-09-01 04:12:29,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:29,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 04:12:29,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:29,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 04:12:29,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-09-01 04:13:09,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 254 [2023-09-01 04:13:09,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 309 transitions, 5505 flow. Second operand has 48 states, 48 states have (on average 100.0) internal successors, (4800), 48 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:09,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:09,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 254 [2023-09-01 04:13:09,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:35,437 WARN L222 SmtUtils]: Spent 14.68s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:13:49,638 WARN L222 SmtUtils]: Spent 11.67s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:14:01,891 WARN L222 SmtUtils]: Spent 9.80s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:14:12,759 WARN L222 SmtUtils]: Spent 8.30s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:14:22,654 WARN L222 SmtUtils]: Spent 7.04s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:14:32,573 WARN L222 SmtUtils]: Spent 6.95s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:14:47,659 WARN L222 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:16:04,607 INFO L130 PetriNetUnfolder]: 123860/232604 cut-off events. [2023-09-01 04:16:04,608 INFO L131 PetriNetUnfolder]: For 2671121/2671121 co-relation queries the response was YES. [2023-09-01 04:16:09,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1711096 conditions, 232604 events. 123860/232604 cut-off events. For 2671121/2671121 co-relation queries the response was YES. Maximal size of possible extension queue 2903. Compared 2469957 event pairs, 79926 based on Foata normal form. 24/232628 useless extension candidates. Maximal degree in co-relation 1711005. Up to 139021 conditions per place. [2023-09-01 04:16:09,594 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 11846 selfloop transitions, 48 changer transitions 0/11894 dead transitions. [2023-09-01 04:16:09,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 11894 transitions, 243847 flow [2023-09-01 04:16:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 04:16:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 04:16:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5372 transitions. [2023-09-01 04:16:09,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406167979002625 [2023-09-01 04:16:09,719 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5372 transitions. [2023-09-01 04:16:09,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5372 transitions. [2023-09-01 04:16:09,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:16:09,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5372 transitions. [2023-09-01 04:16:09,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 111.91666666666667) internal successors, (5372), 48 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:09,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 254.0) internal successors, (12446), 49 states have internal predecessors, (12446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:09,731 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 254.0) internal successors, (12446), 49 states have internal predecessors, (12446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:16:09,731 INFO L175 Difference]: Start difference. First operand has 249 places, 309 transitions, 5505 flow. Second operand 48 states and 5372 transitions. [2023-09-01 04:16:09,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 11894 transitions, 243847 flow Killed by 15