./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.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 b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:37:51,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:37:51,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:37:51,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:37:51,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:37:51,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:37:51,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:37:51,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:37:51,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:37:51,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:37:51,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:37:51,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:37:51,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:37:51,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:37:51,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:37:51,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:37:51,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:37:51,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:37:51,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:37:51,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:37:51,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:37:51,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:37:51,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:37:51,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:37:51,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:37:51,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:37:51,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:37:51,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:37:51,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:37:51,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:37:51,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:37:51,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:37:51,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:37:51,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:37:51,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:37:51,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:37:51,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:37:51,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:37:51,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:37:51,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:37:51,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:37:51,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:37:51,813 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:37:51,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:37:51,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:37:51,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:37:51,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:37:51,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:37:51,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:37:51,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:37:51,816 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:37:51,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:37:51,817 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:37:51,817 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:37:51,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:37:51,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:37:51,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:37:51,817 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:37:51,817 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:37:51,818 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:37:51,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:37:51,818 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:37:51,818 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:37:51,818 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:37:51,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:37:51,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:37:51,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:37:51,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:37:51,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:37:51,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:37:51,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:37:51,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:37:51,819 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:37:51,820 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:37:51,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:37:51,820 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:37:51,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:37:52,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:37:52,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:37:52,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:37:52,071 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:37:52,072 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:37:52,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-08-29 22:37:52,925 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:37:53,090 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:37:53,090 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-08-29 22:37:53,094 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2055e87ba/4ed2683112a34f1cb57428d91129b106/FLAG3b0817af2 [2023-08-29 22:37:53,103 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2055e87ba/4ed2683112a34f1cb57428d91129b106 [2023-08-29 22:37:53,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:37:53,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:37:53,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:37:53,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:37:53,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:37:53,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:37:53" (1/1) ... [2023-08-29 22:37:53,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567aafa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:53, skipping insertion in model container [2023-08-29 22:37:53,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:37:53" (1/1) ... [2023-08-29 22:37:53,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:37:53,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:37:53,251 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-08-29 22:37:53,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:37:53,274 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) [2023-08-29 22:37:53,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61182c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:53, skipping insertion in model container [2023-08-29 22:37:53,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:37:53,277 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:37:53,279 INFO L158 Benchmark]: Toolchain (without parser) took 171.93ms. Allocated memory is still 102.8MB. Free memory was 80.8MB in the beginning and 69.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:37:53,279 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory was 47.6MB in the beginning and 47.5MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:37:53,280 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.37ms. Allocated memory is still 102.8MB. Free memory was 80.5MB in the beginning and 69.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:37:53,281 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory was 47.6MB in the beginning and 47.5MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 170.37ms. Allocated memory is still 102.8MB. Free memory was 80.5MB in the beginning and 69.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: 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/chl-chromosome-subst.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 b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:37:54,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:37:54,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:37:54,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:37:54,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:37:54,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:37:54,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:37:54,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:37:54,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:37:54,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:37:54,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:37:54,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:37:54,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:37:54,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:37:54,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:37:54,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:37:54,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:37:54,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:37:54,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:37:54,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:37:54,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:37:54,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:37:54,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:37:54,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:37:54,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:37:54,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:37:54,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:37:54,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:37:54,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:37:54,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:37:54,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:37:54,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:37:54,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:37:54,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:37:54,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:37:54,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:37:54,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:37:54,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:37:54,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:37:54,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:37:54,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:37:54,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:37:54,735 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:37:54,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:37:54,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:37:54,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:37:54,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:37:54,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:37:54,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:37:54,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:37:54,737 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:37:54,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:37:54,738 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:37:54,738 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:37:54,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:37:54,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:37:54,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:37:54,739 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:37:54,739 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:37:54,739 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:37:54,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:37:54,739 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:37:54,740 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:37:54,740 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:37:54,740 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:37:54,740 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:37:54,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:37:54,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:37:54,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:37:54,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:37:54,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:37:54,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:37:54,741 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:37:54,741 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:37:54,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:37:54,742 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:37:54,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:37:54,742 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:37:54,742 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:37:54,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:37:54,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:37:54,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:37:54,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:37:54,990 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:37:54,990 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:37:54,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-08-29 22:37:55,886 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:37:56,022 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:37:56,023 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-08-29 22:37:56,027 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8963a8816/8c179903cb9544148b3cb83a3f2fb54f/FLAGd85685b51 [2023-08-29 22:37:56,038 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8963a8816/8c179903cb9544148b3cb83a3f2fb54f [2023-08-29 22:37:56,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:37:56,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:37:56,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:37:56,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:37:56,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:37:56,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6861a75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56, skipping insertion in model container [2023-08-29 22:37:56,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:37:56,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:37:56,170 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-08-29 22:37:56,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:37:56,200 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:37:56,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:37:56,215 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-08-29 22:37:56,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:37:56,221 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:37:56,235 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-08-29 22:37:56,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:37:56,254 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:37:56,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56 WrapperNode [2023-08-29 22:37:56,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:37:56,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:37:56,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:37:56,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:37:56,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,288 INFO L138 Inliner]: procedures = 28, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 275 [2023-08-29 22:37:56,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:37:56,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:37:56,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:37:56,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:37:56,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:37:56,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:37:56,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:37:56,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:37:56,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (1/1) ... [2023-08-29 22:37:56,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:37:56,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:37:56,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:37:56,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:37:56,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:37:56,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:37:56,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:37:56,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:37:56,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:37:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:37:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:37:56,374 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:37:56,454 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:37:56,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:37:56,965 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:37:56,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:37:56,972 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:37:56,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:37:56 BoogieIcfgContainer [2023-08-29 22:37:56,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:37:56,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:37:56,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:37:56,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:37:56,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:37:56" (1/3) ... [2023-08-29 22:37:56,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e319263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:37:56, skipping insertion in model container [2023-08-29 22:37:56,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:56" (2/3) ... [2023-08-29 22:37:56,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e319263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:37:56, skipping insertion in model container [2023-08-29 22:37:56,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:37:56" (3/3) ... [2023-08-29 22:37:56,979 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2023-08-29 22:37:56,990 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:37:56,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-29 22:37:56,991 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:37:57,089 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:37:57,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 352 transitions, 728 flow [2023-08-29 22:37:57,238 INFO L130 PetriNetUnfolder]: 29/349 cut-off events. [2023-08-29 22:37:57,239 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:37:57,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 349 events. 29/349 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 661 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-08-29 22:37:57,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 352 transitions, 728 flow [2023-08-29 22:37:57,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 345 transitions, 708 flow [2023-08-29 22:37:57,264 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:37:57,279 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 345 transitions, 708 flow [2023-08-29 22:37:57,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 345 transitions, 708 flow [2023-08-29 22:37:57,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 345 transitions, 708 flow [2023-08-29 22:37:57,328 INFO L130 PetriNetUnfolder]: 29/345 cut-off events. [2023-08-29 22:37:57,328 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:37:57,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 345 events. 29/345 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 658 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-08-29 22:37:57,339 INFO L119 LiptonReduction]: Number of co-enabled transitions 19008 [2023-08-29 22:38:18,345 INFO L134 LiptonReduction]: Checked pairs total: 20570 [2023-08-29 22:38:18,347 INFO L136 LiptonReduction]: Total number of compositions: 406 [2023-08-29 22:38:18,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:38:18,364 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;@22672059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:38:18,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-29 22:38:18,367 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:38:18,367 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:38:18,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:18,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:38:18,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:18,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash 45090, now seen corresponding path program 1 times [2023-08-29 22:38:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:18,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93221586] [2023-08-29 22:38:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:18,414 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 [2023-08-29 22:38:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:18,416 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) [2023-08-29 22:38:18,421 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 [2023-08-29 22:38:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:38:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:18,655 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:38:18,656 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:38:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:18,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:18,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:18,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93221586] [2023-08-29 22:38:18,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93221586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:18,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:18,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:38:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290815804] [2023-08-29 22:38:18,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:18,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:38:18,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:18,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:38:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:38:18,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-08-29 22:38:18,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:18,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:18,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-08-29 22:38:18,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:20,471 INFO L130 PetriNetUnfolder]: 11903/16592 cut-off events. [2023-08-29 22:38:20,472 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2023-08-29 22:38:20,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33609 conditions, 16592 events. 11903/16592 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92150 event pairs, 10226 based on Foata normal form. 0/5881 useless extension candidates. Maximal degree in co-relation 15248. Up to 8299 conditions per place. [2023-08-29 22:38:20,548 INFO L137 encePairwiseOnDemand]: 748/758 looper letters, 110 selfloop transitions, 6 changer transitions 0/116 dead transitions. [2023-08-29 22:38:20,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 500 flow [2023-08-29 22:38:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1033 transitions. [2023-08-29 22:38:20,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542656112576957 [2023-08-29 22:38:20,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1033 transitions. [2023-08-29 22:38:20,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1033 transitions. [2023-08-29 22:38:20,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:20,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1033 transitions. [2023-08-29 22:38:20,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:20,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:20,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:20,576 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 140 flow. Second operand 3 states and 1033 transitions. [2023-08-29 22:38:20,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 500 flow [2023-08-29 22:38:20,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 116 transitions, 476 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:38:20,594 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 176 flow [2023-08-29 22:38:20,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-08-29 22:38:20,599 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-08-29 22:38:20,600 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 176 flow [2023-08-29 22:38:20,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:20,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:20,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:38:20,612 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 [2023-08-29 22:38:20,812 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 [2023-08-29 22:38:20,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:20,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:20,813 INFO L85 PathProgramCache]: Analyzing trace with hash 45091, now seen corresponding path program 1 times [2023-08-29 22:38:20,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:20,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421249365] [2023-08-29 22:38:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:20,813 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 [2023-08-29 22:38:20,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:20,818 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) [2023-08-29 22:38:20,819 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 [2023-08-29 22:38:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:38:20,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:20,914 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:38:20,915 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:38:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:20,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:20,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:20,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421249365] [2023-08-29 22:38:20,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421249365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:20,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:20,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:38:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078467232] [2023-08-29 22:38:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:20,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:38:20,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:38:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:38:21,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 758 [2023-08-29 22:38:21,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:21,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:21,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 758 [2023-08-29 22:38:21,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:22,237 INFO L130 PetriNetUnfolder]: 11903/16586 cut-off events. [2023-08-29 22:38:22,237 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-29 22:38:22,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33342 conditions, 16586 events. 11903/16586 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92052 event pairs, 10226 based on Foata normal form. 4/5891 useless extension candidates. Maximal degree in co-relation 16651. Up to 16586 conditions per place. [2023-08-29 22:38:22,286 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-29 22:38:22,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 294 flow [2023-08-29 22:38:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2023-08-29 22:38:22,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313984168865435 [2023-08-29 22:38:22,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2023-08-29 22:38:22,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2023-08-29 22:38:22,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:22,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2023-08-29 22:38:22,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:22,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:22,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:22,295 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 176 flow. Second operand 3 states and 981 transitions. [2023-08-29 22:38:22,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 294 flow [2023-08-29 22:38:22,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:22,297 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 160 flow [2023-08-29 22:38:22,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-08-29 22:38:22,298 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-08-29 22:38:22,298 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 160 flow [2023-08-29 22:38:22,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:22,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:22,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:38:22,305 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 [2023-08-29 22:38:22,505 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 [2023-08-29 22:38:22,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:22,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1402859, now seen corresponding path program 1 times [2023-08-29 22:38:22,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:22,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749155144] [2023-08-29 22:38:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:22,510 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 [2023-08-29 22:38:22,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:22,511 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) [2023-08-29 22:38:22,512 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 [2023-08-29 22:38:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:22,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:38:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:22,643 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:38:22,644 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:38:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:22,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:22,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749155144] [2023-08-29 22:38:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749155144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:22,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:22,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:38:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509240954] [2023-08-29 22:38:22,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:38:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:38:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:38:23,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 758 [2023-08-29 22:38:23,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:23,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:23,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 758 [2023-08-29 22:38:23,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:28,494 INFO L130 PetriNetUnfolder]: 29756/41459 cut-off events. [2023-08-29 22:38:28,494 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2023-08-29 22:38:28,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83317 conditions, 41459 events. 29756/41459 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 2429. Compared 256637 event pairs, 25565 based on Foata normal form. 0/14706 useless extension candidates. Maximal degree in co-relation 83309. Up to 8297 conditions per place. [2023-08-29 22:38:28,652 INFO L137 encePairwiseOnDemand]: 749/758 looper letters, 248 selfloop transitions, 21 changer transitions 0/269 dead transitions. [2023-08-29 22:38:28,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 269 transitions, 1166 flow [2023-08-29 22:38:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:38:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:38:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2066 transitions. [2023-08-29 22:38:28,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542656112576957 [2023-08-29 22:38:28,658 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2066 transitions. [2023-08-29 22:38:28,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2066 transitions. [2023-08-29 22:38:28,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:28,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2066 transitions. [2023-08-29 22:38:28,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 344.3333333333333) internal successors, (2066), 6 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:28,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:28,668 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:28,668 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 160 flow. Second operand 6 states and 2066 transitions. [2023-08-29 22:38:28,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 269 transitions, 1166 flow [2023-08-29 22:38:28,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 269 transitions, 1165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:28,673 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 309 flow [2023-08-29 22:38:28,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-08-29 22:38:28,675 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-29 22:38:28,676 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 309 flow [2023-08-29 22:38:28,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:28,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:28,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:38:28,683 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 (4)] Ended with exit code 0 [2023-08-29 22:38:28,883 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 [2023-08-29 22:38:28,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:28,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash 43552649, now seen corresponding path program 1 times [2023-08-29 22:38:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:28,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299029058] [2023-08-29 22:38:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:28,886 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 [2023-08-29 22:38:28,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:28,887 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) [2023-08-29 22:38:28,889 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 [2023-08-29 22:38:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:28,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 22:38:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:28,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:28,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:28,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299029058] [2023-08-29 22:38:28,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299029058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:28,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:28,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:38:28,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969791582] [2023-08-29 22:38:28,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:28,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:38:28,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:28,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:38:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:38:29,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 758 [2023-08-29 22:38:29,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:29,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:29,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 758 [2023-08-29 22:38:29,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:31,309 INFO L130 PetriNetUnfolder]: 23805/33171 cut-off events. [2023-08-29 22:38:31,310 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-29 22:38:31,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 33171 events. 23805/33171 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 200914 event pairs, 20452 based on Foata normal form. 3/11778 useless extension candidates. Maximal degree in co-relation 66705. Up to 33163 conditions per place. [2023-08-29 22:38:31,446 INFO L137 encePairwiseOnDemand]: 749/758 looper letters, 63 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-08-29 22:38:31,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 451 flow [2023-08-29 22:38:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 995 transitions. [2023-08-29 22:38:31,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43755496921723835 [2023-08-29 22:38:31,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 995 transitions. [2023-08-29 22:38:31,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 995 transitions. [2023-08-29 22:38:31,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:31,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 995 transitions. [2023-08-29 22:38:31,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:31,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:31,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:31,455 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 309 flow. Second operand 3 states and 995 transitions. [2023-08-29 22:38:31,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 451 flow [2023-08-29 22:38:31,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 421 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:31,457 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 313 flow [2023-08-29 22:38:31,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2023-08-29 22:38:31,458 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-29 22:38:31,458 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 313 flow [2023-08-29 22:38:31,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:31,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:31,459 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:38:31,469 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 [2023-08-29 22:38:31,666 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 [2023-08-29 22:38:31,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:31,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1152066974, now seen corresponding path program 2 times [2023-08-29 22:38:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:31,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971718262] [2023-08-29 22:38:31,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:38:31,668 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 [2023-08-29 22:38:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:31,669 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) [2023-08-29 22:38:31,669 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 [2023-08-29 22:38:31,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:38:31,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:38:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:38:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:31,807 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:38:31,808 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:38:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:31,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:32,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:32,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971718262] [2023-08-29 22:38:32,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971718262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:32,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:32,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:38:32,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578401510] [2023-08-29 22:38:32,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:32,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:38:32,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:38:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:38:35,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 758 [2023-08-29 22:38:35,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:35,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:35,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 758 [2023-08-29 22:38:35,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:39,328 INFO L130 PetriNetUnfolder]: 29756/41462 cut-off events. [2023-08-29 22:38:39,328 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-29 22:38:39,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83396 conditions, 41462 events. 29756/41462 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 251523 event pairs, 25565 based on Foata normal form. 3/14725 useless extension candidates. Maximal degree in co-relation 83382. Up to 8296 conditions per place. [2023-08-29 22:38:39,463 INFO L137 encePairwiseOnDemand]: 749/758 looper letters, 246 selfloop transitions, 26 changer transitions 0/272 dead transitions. [2023-08-29 22:38:39,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 272 transitions, 1323 flow [2023-08-29 22:38:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:38:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:38:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2361 transitions. [2023-08-29 22:38:39,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44496796079909534 [2023-08-29 22:38:39,468 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2361 transitions. [2023-08-29 22:38:39,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2361 transitions. [2023-08-29 22:38:39,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:39,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2361 transitions. [2023-08-29 22:38:39,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.2857142857143) internal successors, (2361), 7 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:39,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:39,478 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:39,478 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 313 flow. Second operand 7 states and 2361 transitions. [2023-08-29 22:38:39,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 272 transitions, 1323 flow [2023-08-29 22:38:39,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 272 transitions, 1295 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:39,481 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 391 flow [2023-08-29 22:38:39,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2023-08-29 22:38:39,482 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-08-29 22:38:39,482 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 391 flow [2023-08-29 22:38:39,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:39,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:39,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:39,492 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 [2023-08-29 22:38:39,694 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 [2023-08-29 22:38:39,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:39,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1300315920, now seen corresponding path program 1 times [2023-08-29 22:38:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:39,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101611438] [2023-08-29 22:38:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:39,696 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 [2023-08-29 22:38:39,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:39,697 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) [2023-08-29 22:38:39,698 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 [2023-08-29 22:38:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:39,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:38:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:38:39,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:38:39,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:39,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101611438] [2023-08-29 22:38:39,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101611438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:39,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:39,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-29 22:38:39,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214807440] [2023-08-29 22:38:39,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:38:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:39,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:38:39,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:38:40,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-08-29 22:38:40,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 305.6666666666667) internal successors, (1834), 6 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:40,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:40,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-08-29 22:38:40,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:41,297 INFO L130 PetriNetUnfolder]: 11903/16598 cut-off events. [2023-08-29 22:38:41,297 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-29 22:38:41,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33446 conditions, 16598 events. 11903/16598 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92109 event pairs, 10226 based on Foata normal form. 9/5911 useless extension candidates. Maximal degree in co-relation 33431. Up to 16582 conditions per place. [2023-08-29 22:38:41,357 INFO L137 encePairwiseOnDemand]: 746/758 looper letters, 54 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2023-08-29 22:38:41,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 485 flow [2023-08-29 22:38:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:38:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:38:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1908 transitions. [2023-08-29 22:38:41,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41952506596306066 [2023-08-29 22:38:41,361 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1908 transitions. [2023-08-29 22:38:41,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1908 transitions. [2023-08-29 22:38:41,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:41,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1908 transitions. [2023-08-29 22:38:41,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:41,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:41,368 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:41,368 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 391 flow. Second operand 6 states and 1908 transitions. [2023-08-29 22:38:41,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 485 flow [2023-08-29 22:38:41,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 447 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-29 22:38:41,370 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 378 flow [2023-08-29 22:38:41,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-08-29 22:38:41,371 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-08-29 22:38:41,371 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 378 flow [2023-08-29 22:38:41,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 305.6666666666667) internal successors, (1834), 6 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:41,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:41,372 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1] [2023-08-29 22:38:41,388 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 [2023-08-29 22:38:41,578 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 [2023-08-29 22:38:41,578 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:41,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1354332757, now seen corresponding path program 3 times [2023-08-29 22:38:41,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:41,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860185893] [2023-08-29 22:38:41,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:38:41,579 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 [2023-08-29 22:38:41,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:41,580 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) [2023-08-29 22:38:41,581 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 [2023-08-29 22:38:41,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 22:38:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:38:41,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:38:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:41,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:41,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:41,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860185893] [2023-08-29 22:38:41,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860185893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:41,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:41,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:38:41,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63864278] [2023-08-29 22:38:41,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:38:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:38:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:38:43,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-08-29 22:38:43,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 378 flow. Second operand has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:43,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:43,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-08-29 22:38:43,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:43,926 INFO L130 PetriNetUnfolder]: 5949/8304 cut-off events. [2023-08-29 22:38:43,927 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2023-08-29 22:38:43,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16771 conditions, 8304 events. 5949/8304 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41414 event pairs, 5113 based on Foata normal form. 9/2965 useless extension candidates. Maximal degree in co-relation 16752. Up to 8289 conditions per place. [2023-08-29 22:38:43,951 INFO L137 encePairwiseOnDemand]: 746/758 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2023-08-29 22:38:43,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 66 transitions, 421 flow [2023-08-29 22:38:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:38:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:38:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2509 transitions. [2023-08-29 22:38:43,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137532981530343 [2023-08-29 22:38:43,956 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2509 transitions. [2023-08-29 22:38:43,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2509 transitions. [2023-08-29 22:38:43,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:43,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2509 transitions. [2023-08-29 22:38:43,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 313.625) internal successors, (2509), 8 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:43,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:43,965 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:43,965 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 378 flow. Second operand 8 states and 2509 transitions. [2023-08-29 22:38:43,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 66 transitions, 421 flow [2023-08-29 22:38:43,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 355 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-29 22:38:43,967 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 271 flow [2023-08-29 22:38:43,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2023-08-29 22:38:43,968 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-29 22:38:43,968 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 271 flow [2023-08-29 22:38:43,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:43,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:43,969 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-29 22:38:43,979 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 [2023-08-29 22:38:44,175 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 [2023-08-29 22:38:44,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:44,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash 488945264, now seen corresponding path program 2 times [2023-08-29 22:38:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:44,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679359616] [2023-08-29 22:38:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:38:44,178 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 [2023-08-29 22:38:44,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:44,179 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) [2023-08-29 22:38:44,180 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 [2023-08-29 22:38:44,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:38:44,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:38:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:38:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:44,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:44,336 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:38:44,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 22:38:44,357 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-29 22:38:44,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2023-08-29 22:38:44,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:44,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:44,536 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:38:44,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:38:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:44,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:44,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679359616] [2023-08-29 22:38:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679359616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:44,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:44,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:38:44,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996284692] [2023-08-29 22:38:44,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:44,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:44,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:44,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:38:45,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:38:45,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:45,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:45,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:38:45,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:45,714 INFO L130 PetriNetUnfolder]: 4605/6511 cut-off events. [2023-08-29 22:38:45,714 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-29 22:38:45,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13166 conditions, 6511 events. 4605/6511 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 31737 event pairs, 3945 based on Foata normal form. 0/2492 useless extension candidates. Maximal degree in co-relation 13152. Up to 6511 conditions per place. [2023-08-29 22:38:45,740 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-29 22:38:45,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 385 flow [2023-08-29 22:38:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 990 transitions. [2023-08-29 22:38:45,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43535620052770446 [2023-08-29 22:38:45,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 990 transitions. [2023-08-29 22:38:45,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 990 transitions. [2023-08-29 22:38:45,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:45,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 990 transitions. [2023-08-29 22:38:45,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:45,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:45,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:45,747 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 271 flow. Second operand 3 states and 990 transitions. [2023-08-29 22:38:45,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 385 flow [2023-08-29 22:38:45,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 348 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 22:38:45,748 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 222 flow [2023-08-29 22:38:45,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-08-29 22:38:45,749 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-08-29 22:38:45,749 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 222 flow [2023-08-29 22:38:45,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:45,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:45,749 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-29 22:38:45,757 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 [2023-08-29 22:38:45,956 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 [2023-08-29 22:38:45,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:45,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:45,957 INFO L85 PathProgramCache]: Analyzing trace with hash 488945265, now seen corresponding path program 1 times [2023-08-29 22:38:45,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:45,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016783455] [2023-08-29 22:38:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:45,957 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 [2023-08-29 22:38:45,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:45,958 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) [2023-08-29 22:38:45,960 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 [2023-08-29 22:38:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:38:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:46,269 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 22:38:46,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 22:38:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:46,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:38:46,399 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:38:46,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:38:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:46,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:46,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:46,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016783455] [2023-08-29 22:38:46,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016783455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:46,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:46,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:38:46,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962446180] [2023-08-29 22:38:46,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:46,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:46,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 758 [2023-08-29 22:38:46,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 315.75) internal successors, (1263), 4 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:46,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:46,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 758 [2023-08-29 22:38:46,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:47,040 INFO L130 PetriNetUnfolder]: 3261/4718 cut-off events. [2023-08-29 22:38:47,041 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-29 22:38:47,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9557 conditions, 4718 events. 3261/4718 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 22496 event pairs, 2777 based on Foata normal form. 0/2028 useless extension candidates. Maximal degree in co-relation 9544. Up to 4718 conditions per place. [2023-08-29 22:38:47,053 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-29 22:38:47,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 332 flow [2023-08-29 22:38:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 994 transitions. [2023-08-29 22:38:47,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371152154793316 [2023-08-29 22:38:47,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 994 transitions. [2023-08-29 22:38:47,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 994 transitions. [2023-08-29 22:38:47,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:47,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 994 transitions. [2023-08-29 22:38:47,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:47,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:47,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:47,059 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 222 flow. Second operand 3 states and 994 transitions. [2023-08-29 22:38:47,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 332 flow [2023-08-29 22:38:47,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:47,060 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 209 flow [2023-08-29 22:38:47,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-08-29 22:38:47,061 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-08-29 22:38:47,061 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 209 flow [2023-08-29 22:38:47,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 315.75) internal successors, (1263), 4 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:47,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:47,061 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:47,070 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 [2023-08-29 22:38:47,270 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 [2023-08-29 22:38:47,270 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:47,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:47,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1724996868, now seen corresponding path program 1 times [2023-08-29 22:38:47,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:47,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658548923] [2023-08-29 22:38:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:47,271 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 [2023-08-29 22:38:47,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:47,272 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) [2023-08-29 22:38:47,274 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 [2023-08-29 22:38:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:38:47,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:47,552 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 22:38:47,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 22:38:47,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:47,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:38:47,722 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:38:47,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:38:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:47,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:47,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:47,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658548923] [2023-08-29 22:38:47,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658548923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:47,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:47,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:38:47,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094926914] [2023-08-29 22:38:47,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:47,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:47,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:47,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 758 [2023-08-29 22:38:47,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 316.25) internal successors, (1265), 4 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:47,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:47,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 758 [2023-08-29 22:38:47,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:48,406 INFO L130 PetriNetUnfolder]: 3141/4534 cut-off events. [2023-08-29 22:38:48,406 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-29 22:38:48,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9190 conditions, 4534 events. 3141/4534 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 21473 event pairs, 2673 based on Foata normal form. 0/1988 useless extension candidates. Maximal degree in co-relation 9176. Up to 4534 conditions per place. [2023-08-29 22:38:48,419 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 59 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-29 22:38:48,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 325 flow [2023-08-29 22:38:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 992 transitions. [2023-08-29 22:38:48,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436235708003518 [2023-08-29 22:38:48,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 992 transitions. [2023-08-29 22:38:48,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 992 transitions. [2023-08-29 22:38:48,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:48,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 992 transitions. [2023-08-29 22:38:48,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:48,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:48,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:48,424 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 209 flow. Second operand 3 states and 992 transitions. [2023-08-29 22:38:48,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 325 flow [2023-08-29 22:38:48,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:48,425 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 206 flow [2023-08-29 22:38:48,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-08-29 22:38:48,426 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-08-29 22:38:48,426 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 206 flow [2023-08-29 22:38:48,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.25) internal successors, (1265), 4 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:48,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:48,426 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:48,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:48,627 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 [2023-08-29 22:38:48,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:48,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1724996870, now seen corresponding path program 1 times [2023-08-29 22:38:48,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:48,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156215873] [2023-08-29 22:38:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:48,628 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 [2023-08-29 22:38:48,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:48,628 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) [2023-08-29 22:38:48,630 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 [2023-08-29 22:38:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:38:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:48,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:48,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:48,925 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-29 22:38:48,926 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-29 22:38:48,936 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 [2023-08-29 22:38:49,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:49,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:49,090 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:38:49,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:38:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:49,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:49,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:49,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156215873] [2023-08-29 22:38:49,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156215873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:49,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:49,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:38:49,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772821075] [2023-08-29 22:38:49,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:49,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:49,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:38:49,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:38:49,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:49,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:49,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:38:49,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:50,115 INFO L130 PetriNetUnfolder]: 3021/4350 cut-off events. [2023-08-29 22:38:50,115 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-29 22:38:50,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 4350 events. 3021/4350 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 20468 event pairs, 2569 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 8808. Up to 4350 conditions per place. [2023-08-29 22:38:50,127 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-29 22:38:50,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 318 flow [2023-08-29 22:38:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2023-08-29 22:38:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43271767810026385 [2023-08-29 22:38:50,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2023-08-29 22:38:50,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2023-08-29 22:38:50,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:50,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2023-08-29 22:38:50,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:50,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:50,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:50,133 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 206 flow. Second operand 3 states and 984 transitions. [2023-08-29 22:38:50,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 318 flow [2023-08-29 22:38:50,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:50,134 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 203 flow [2023-08-29 22:38:50,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2023-08-29 22:38:50,135 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-08-29 22:38:50,135 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 203 flow [2023-08-29 22:38:50,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:50,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:50,135 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:50,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:50,346 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 [2023-08-29 22:38:50,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:50,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:50,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1935297847, now seen corresponding path program 1 times [2023-08-29 22:38:50,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:50,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215357198] [2023-08-29 22:38:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:50,347 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 [2023-08-29 22:38:50,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:50,348 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) [2023-08-29 22:38:50,349 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 [2023-08-29 22:38:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:38:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:50,636 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:38:50,637 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:38:50,665 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:38:50,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:38:50,687 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:38:50,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:38:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:50,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:50,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215357198] [2023-08-29 22:38:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215357198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:50,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:50,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:38:50,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229094350] [2023-08-29 22:38:50,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:50,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:50,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:50,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:38:50,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 758 [2023-08-29 22:38:50,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:50,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:50,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 758 [2023-08-29 22:38:50,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:51,304 INFO L130 PetriNetUnfolder]: 2346/3389 cut-off events. [2023-08-29 22:38:51,304 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-29 22:38:51,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6886 conditions, 3389 events. 2346/3389 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 15216 event pairs, 1962 based on Foata normal form. 0/1625 useless extension candidates. Maximal degree in co-relation 6870. Up to 3383 conditions per place. [2023-08-29 22:38:51,313 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-29 22:38:51,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 311 flow [2023-08-29 22:38:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:38:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:38:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1250 transitions. [2023-08-29 22:38:51,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226912928759896 [2023-08-29 22:38:51,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1250 transitions. [2023-08-29 22:38:51,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1250 transitions. [2023-08-29 22:38:51,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:51,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1250 transitions. [2023-08-29 22:38:51,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 312.5) internal successors, (1250), 4 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:51,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:51,319 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:51,320 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 203 flow. Second operand 4 states and 1250 transitions. [2023-08-29 22:38:51,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 311 flow [2023-08-29 22:38:51,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:51,321 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 202 flow [2023-08-29 22:38:51,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-29 22:38:51,321 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-08-29 22:38:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 202 flow [2023-08-29 22:38:51,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:51,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:51,322 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:51,332 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 [2023-08-29 22:38:51,538 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 [2023-08-29 22:38:51,539 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:51,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1935297910, now seen corresponding path program 1 times [2023-08-29 22:38:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:51,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437545079] [2023-08-29 22:38:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:51,540 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 [2023-08-29 22:38:51,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:51,540 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) [2023-08-29 22:38:51,541 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 [2023-08-29 22:38:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:51,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:38:51,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:51,797 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:38:51,821 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:38:51,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:38:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:51,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:51,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:51,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437545079] [2023-08-29 22:38:51,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437545079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:51,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:51,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:38:51,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090030904] [2023-08-29 22:38:51,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:51,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:51,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:51,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 758 [2023-08-29 22:38:51,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 303.5) internal successors, (1214), 4 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:51,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:51,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 758 [2023-08-29 22:38:51,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:52,275 INFO L130 PetriNetUnfolder]: 1801/2614 cut-off events. [2023-08-29 22:38:52,276 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-29 22:38:52,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5330 conditions, 2614 events. 1801/2614 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 11152 event pairs, 1477 based on Foata normal form. 0/1336 useless extension candidates. Maximal degree in co-relation 5313. Up to 2602 conditions per place. [2023-08-29 22:38:52,283 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-29 22:38:52,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 306 flow [2023-08-29 22:38:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:38:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:38:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1248 transitions. [2023-08-29 22:38:52,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41160949868073876 [2023-08-29 22:38:52,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1248 transitions. [2023-08-29 22:38:52,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1248 transitions. [2023-08-29 22:38:52,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:52,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1248 transitions. [2023-08-29 22:38:52,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:52,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:52,290 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:52,290 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 202 flow. Second operand 4 states and 1248 transitions. [2023-08-29 22:38:52,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 306 flow [2023-08-29 22:38:52,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:52,291 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 199 flow [2023-08-29 22:38:52,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-08-29 22:38:52,292 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-08-29 22:38:52,292 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 199 flow [2023-08-29 22:38:52,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 303.5) internal successors, (1214), 4 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:52,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:52,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:52,300 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 [2023-08-29 22:38:52,492 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 [2023-08-29 22:38:52,492 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:52,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:52,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1935297911, now seen corresponding path program 1 times [2023-08-29 22:38:52,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:52,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136483967] [2023-08-29 22:38:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:52,494 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 [2023-08-29 22:38:52,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:52,495 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) [2023-08-29 22:38:52,496 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 [2023-08-29 22:38:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:52,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:38:52,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:52,757 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:38:52,760 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:38:52,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:52,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:52,813 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:38:52,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:38:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:52,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:52,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:52,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136483967] [2023-08-29 22:38:52,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136483967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:52,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:52,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:38:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570528575] [2023-08-29 22:38:52,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:52,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:52,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:38:53,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 758 [2023-08-29 22:38:53,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 301.0) internal successors, (1505), 5 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:53,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:53,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 758 [2023-08-29 22:38:53,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:53,757 INFO L130 PetriNetUnfolder]: 3065/4444 cut-off events. [2023-08-29 22:38:53,757 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-29 22:38:53,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9023 conditions, 4444 events. 3065/4444 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22208 event pairs, 1477 based on Foata normal form. 0/2270 useless extension candidates. Maximal degree in co-relation 9006. Up to 2602 conditions per place. [2023-08-29 22:38:53,771 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-29 22:38:53,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 440 flow [2023-08-29 22:38:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:38:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:38:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1570 transitions. [2023-08-29 22:38:53,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41424802110817943 [2023-08-29 22:38:53,774 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1570 transitions. [2023-08-29 22:38:53,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1570 transitions. [2023-08-29 22:38:53,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:53,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1570 transitions. [2023-08-29 22:38:53,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:53,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:53,779 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:53,779 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 199 flow. Second operand 5 states and 1570 transitions. [2023-08-29 22:38:53,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 440 flow [2023-08-29 22:38:53,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:53,781 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 212 flow [2023-08-29 22:38:53,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-29 22:38:53,781 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-08-29 22:38:53,781 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 212 flow [2023-08-29 22:38:53,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 301.0) internal successors, (1505), 5 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:53,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:53,781 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:53,790 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 (15)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:53,982 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 [2023-08-29 22:38:53,982 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:53,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1935297848, now seen corresponding path program 1 times [2023-08-29 22:38:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:53,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104767450] [2023-08-29 22:38:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:53,983 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 [2023-08-29 22:38:53,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:53,983 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) [2023-08-29 22:38:53,984 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 [2023-08-29 22:38:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:54,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:38:54,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:54,338 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:38:54,339 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:38:54,406 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:38:54,406 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:38:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:54,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:54,480 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:38:54,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:38:54,515 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:38:54,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:54,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:54,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104767450] [2023-08-29 22:38:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104767450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:54,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:54,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:38:54,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782453677] [2023-08-29 22:38:54,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:38:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:38:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:38:54,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 758 [2023-08-29 22:38:54,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:54,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:54,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 758 [2023-08-29 22:38:54,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:55,453 INFO L130 PetriNetUnfolder]: 2797/4062 cut-off events. [2023-08-29 22:38:55,453 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2023-08-29 22:38:55,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 4062 events. 2797/4062 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19865 event pairs, 1477 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 8805. Up to 2608 conditions per place. [2023-08-29 22:38:55,466 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-29 22:38:55,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 447 flow [2023-08-29 22:38:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:38:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:38:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1569 transitions. [2023-08-29 22:38:55,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139841688654354 [2023-08-29 22:38:55,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1569 transitions. [2023-08-29 22:38:55,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1569 transitions. [2023-08-29 22:38:55,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:55,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1569 transitions. [2023-08-29 22:38:55,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:55,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:55,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:55,474 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 212 flow. Second operand 5 states and 1569 transitions. [2023-08-29 22:38:55,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 447 flow [2023-08-29 22:38:55,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:38:55,475 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 218 flow [2023-08-29 22:38:55,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-29 22:38:55,476 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-29 22:38:55,476 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 218 flow [2023-08-29 22:38:55,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:55,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:55,476 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:55,485 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 [2023-08-29 22:38:55,676 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 [2023-08-29 22:38:55,677 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:55,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash -135353714, now seen corresponding path program 1 times [2023-08-29 22:38:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656623020] [2023-08-29 22:38:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:55,677 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 [2023-08-29 22:38:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:55,678 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) [2023-08-29 22:38:55,679 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 [2023-08-29 22:38:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:55,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:38:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:55,989 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 22:38:55,990 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 33 treesize of output 44 [2023-08-29 22:38:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:56,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:38:56,091 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:38:56,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:38:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:56,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:56,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656623020] [2023-08-29 22:38:56,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656623020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:56,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:56,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:38:56,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434956819] [2023-08-29 22:38:56,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:56,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 758 [2023-08-29 22:38:56,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 312.75) internal successors, (1251), 4 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:56,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:56,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 758 [2023-08-29 22:38:56,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:56,820 INFO L130 PetriNetUnfolder]: 2659/3849 cut-off events. [2023-08-29 22:38:56,820 INFO L131 PetriNetUnfolder]: For 1331/1331 co-relation queries the response was YES. [2023-08-29 22:38:56,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8684 conditions, 3849 events. 2659/3849 cut-off events. For 1331/1331 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17505 event pairs, 2233 based on Foata normal form. 0/2284 useless extension candidates. Maximal degree in co-relation 8665. Up to 3849 conditions per place. [2023-08-29 22:38:56,832 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-29 22:38:56,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 320 flow [2023-08-29 22:38:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2023-08-29 22:38:56,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42744063324538256 [2023-08-29 22:38:56,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2023-08-29 22:38:56,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2023-08-29 22:38:56,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:56,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2023-08-29 22:38:56,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:56,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:56,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:56,837 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 218 flow. Second operand 3 states and 972 transitions. [2023-08-29 22:38:56,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 320 flow [2023-08-29 22:38:56,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:38:56,839 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 208 flow [2023-08-29 22:38:56,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-29 22:38:56,839 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-08-29 22:38:56,839 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 208 flow [2023-08-29 22:38:56,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 312.75) internal successors, (1251), 4 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:56,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:56,840 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:56,849 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 [2023-08-29 22:38:57,048 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 [2023-08-29 22:38:57,049 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:57,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash -135353713, now seen corresponding path program 1 times [2023-08-29 22:38:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:57,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445452049] [2023-08-29 22:38:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:57,050 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 [2023-08-29 22:38:57,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:57,051 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) [2023-08-29 22:38:57,051 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 [2023-08-29 22:38:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:57,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:38:57,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:57,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:57,386 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-29 22:38:57,386 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 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-29 22:38:57,396 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 88 treesize of output 84 [2023-08-29 22:38:57,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:57,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:57,530 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:38:57,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:38:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:57,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:57,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:57,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445452049] [2023-08-29 22:38:57,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445452049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:57,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:57,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:38:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37259137] [2023-08-29 22:38:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:57,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:57,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:57,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:38:58,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 758 [2023-08-29 22:38:58,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:58,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:58,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 758 [2023-08-29 22:38:58,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:58,643 INFO L130 PetriNetUnfolder]: 2521/3636 cut-off events. [2023-08-29 22:38:58,644 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2023-08-29 22:38:58,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8001 conditions, 3636 events. 2521/3636 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16365 event pairs, 2113 based on Foata normal form. 0/2204 useless extension candidates. Maximal degree in co-relation 7982. Up to 3636 conditions per place. [2023-08-29 22:38:58,655 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-29 22:38:58,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 306 flow [2023-08-29 22:38:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2023-08-29 22:38:58,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42656112576956906 [2023-08-29 22:38:58,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2023-08-29 22:38:58,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2023-08-29 22:38:58,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:58,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2023-08-29 22:38:58,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:58,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:58,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:58,660 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 208 flow. Second operand 3 states and 970 transitions. [2023-08-29 22:38:58,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 306 flow [2023-08-29 22:38:58,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:58,662 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 205 flow [2023-08-29 22:38:58,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-08-29 22:38:58,662 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-08-29 22:38:58,662 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 205 flow [2023-08-29 22:38:58,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:58,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:58,663 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:58,675 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 [2023-08-29 22:38:58,872 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 [2023-08-29 22:38:58,872 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:38:58,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:58,873 INFO L85 PathProgramCache]: Analyzing trace with hash 100495166, now seen corresponding path program 1 times [2023-08-29 22:38:58,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:58,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784708021] [2023-08-29 22:38:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:58,873 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 [2023-08-29 22:38:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:58,874 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) [2023-08-29 22:38:58,876 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 [2023-08-29 22:38:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:38:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:59,183 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:38:59,214 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:38:59,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:59,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:38:59,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784708021] [2023-08-29 22:38:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784708021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:59,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:59,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:38:59,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174059631] [2023-08-29 22:38:59,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:59,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:38:59,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:59,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:38:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:39:01,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-08-29 22:39:01,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 205 flow. Second operand has 10 states, 10 states have (on average 306.2) internal successors, (3062), 10 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:01,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:01,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-08-29 22:39:01,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:03,202 INFO L130 PetriNetUnfolder]: 5941/8550 cut-off events. [2023-08-29 22:39:03,202 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-08-29 22:39:03,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18526 conditions, 8550 events. 5941/8550 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 44651 event pairs, 1325 based on Foata normal form. 300/5438 useless extension candidates. Maximal degree in co-relation 18506. Up to 2326 conditions per place. [2023-08-29 22:39:03,233 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 154 selfloop transitions, 7 changer transitions 0/161 dead transitions. [2023-08-29 22:39:03,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 161 transitions, 779 flow [2023-08-29 22:39:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:39:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:39:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2584 transitions. [2023-08-29 22:39:03,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261213720316623 [2023-08-29 22:39:03,237 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2584 transitions. [2023-08-29 22:39:03,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2584 transitions. [2023-08-29 22:39:03,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:03,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2584 transitions. [2023-08-29 22:39:03,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:03,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:03,243 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:03,243 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 205 flow. Second operand 8 states and 2584 transitions. [2023-08-29 22:39:03,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 161 transitions, 779 flow [2023-08-29 22:39:03,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 161 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:39:03,246 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 244 flow [2023-08-29 22:39:03,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-08-29 22:39:03,246 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-29 22:39:03,246 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 244 flow [2023-08-29 22:39:03,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 306.2) internal successors, (3062), 10 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:03,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:03,247 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:03,257 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 [2023-08-29 22:39:03,448 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 [2023-08-29 22:39:03,449 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:03,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:03,449 INFO L85 PathProgramCache]: Analyzing trace with hash 100495103, now seen corresponding path program 1 times [2023-08-29 22:39:03,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:03,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989126760] [2023-08-29 22:39:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:03,450 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 [2023-08-29 22:39:03,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:03,450 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) [2023-08-29 22:39:03,452 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 [2023-08-29 22:39:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 22:39:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:03,852 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:39:03,852 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:39:03,917 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:39:03,917 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:39:03,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:03,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:03,982 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:03,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:04,015 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:39:04,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:04,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:06,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:06,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989126760] [2023-08-29 22:39:06,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989126760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:06,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:06,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:39:06,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180642908] [2023-08-29 22:39:06,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:06,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:39:06,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:39:06,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:39:09,614 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 [1] [2023-08-29 22:39:12,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:39:13,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:39:22,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 758 [2023-08-29 22:39:22,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:22,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:22,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 758 [2023-08-29 22:39:22,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:23,449 INFO L130 PetriNetUnfolder]: 5221/7530 cut-off events. [2023-08-29 22:39:23,449 INFO L131 PetriNetUnfolder]: For 2784/2784 co-relation queries the response was YES. [2023-08-29 22:39:23,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17367 conditions, 7530 events. 5221/7530 cut-off events. For 2784/2784 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 37886 event pairs, 901 based on Foata normal form. 300/4754 useless extension candidates. Maximal degree in co-relation 17343. Up to 1978 conditions per place. [2023-08-29 22:39:23,475 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 148 selfloop transitions, 10 changer transitions 0/158 dead transitions. [2023-08-29 22:39:23,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 158 transitions, 788 flow [2023-08-29 22:39:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:39:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:39:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2516 transitions. [2023-08-29 22:39:23,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41490765171503957 [2023-08-29 22:39:23,479 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2516 transitions. [2023-08-29 22:39:23,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2516 transitions. [2023-08-29 22:39:23,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:23,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2516 transitions. [2023-08-29 22:39:23,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 314.5) internal successors, (2516), 8 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:23,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:23,485 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:23,485 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 244 flow. Second operand 8 states and 2516 transitions. [2023-08-29 22:39:23,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 158 transitions, 788 flow [2023-08-29 22:39:23,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 158 transitions, 777 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:39:23,492 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 278 flow [2023-08-29 22:39:23,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=278, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2023-08-29 22:39:23,493 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-08-29 22:39:23,493 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 278 flow [2023-08-29 22:39:23,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:23,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:23,493 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:23,504 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 [2023-08-29 22:39:23,694 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 [2023-08-29 22:39:23,694 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:23,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 99005879, now seen corresponding path program 1 times [2023-08-29 22:39:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:23,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777242370] [2023-08-29 22:39:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:23,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:23,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:23,695 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) [2023-08-29 22:39:23,696 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 [2023-08-29 22:39:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:24,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:39:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:24,089 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:39:24,089 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:39:24,152 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:39:24,153 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:39:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:24,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:24,218 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:24,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:24,248 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:39:24,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:24,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:24,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:24,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777242370] [2023-08-29 22:39:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777242370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:24,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:24,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:39:24,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941445478] [2023-08-29 22:39:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:39:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:39:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:39:24,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 758 [2023-08-29 22:39:24,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:24,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:24,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 758 [2023-08-29 22:39:24,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:25,995 INFO L130 PetriNetUnfolder]: 8941/12880 cut-off events. [2023-08-29 22:39:25,996 INFO L131 PetriNetUnfolder]: For 11835/11835 co-relation queries the response was YES. [2023-08-29 22:39:26,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32692 conditions, 12880 events. 8941/12880 cut-off events. For 11835/11835 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 72211 event pairs, 4477 based on Foata normal form. 0/8408 useless extension candidates. Maximal degree in co-relation 32664. Up to 7524 conditions per place. [2023-08-29 22:39:26,057 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-29 22:39:26,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 86 transitions, 588 flow [2023-08-29 22:39:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:39:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:39:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1560 transitions. [2023-08-29 22:39:26,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41160949868073876 [2023-08-29 22:39:26,060 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1560 transitions. [2023-08-29 22:39:26,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1560 transitions. [2023-08-29 22:39:26,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:26,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1560 transitions. [2023-08-29 22:39:26,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:26,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:26,064 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:26,064 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 278 flow. Second operand 5 states and 1560 transitions. [2023-08-29 22:39:26,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 86 transitions, 588 flow [2023-08-29 22:39:26,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 537 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-08-29 22:39:26,078 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 267 flow [2023-08-29 22:39:26,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-08-29 22:39:26,079 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-08-29 22:39:26,079 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 267 flow [2023-08-29 22:39:26,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:26,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:26,079 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:26,089 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 (21)] Ended with exit code 0 [2023-08-29 22:39:26,281 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 [2023-08-29 22:39:26,281 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:26,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:26,282 INFO L85 PathProgramCache]: Analyzing trace with hash 99005947, now seen corresponding path program 1 times [2023-08-29 22:39:26,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:26,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205324928] [2023-08-29 22:39:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:26,282 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 [2023-08-29 22:39:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:26,283 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) [2023-08-29 22:39:26,284 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 [2023-08-29 22:39:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:26,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:39:26,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:26,519 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:39:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:26,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:26,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:26,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205324928] [2023-08-29 22:39:26,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205324928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:26,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:26,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:39:26,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386385409] [2023-08-29 22:39:26,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:26,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:39:26,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:39:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:39:26,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 758 [2023-08-29 22:39:26,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 307.4) internal successors, (1537), 5 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:26,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:26,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 758 [2023-08-29 22:39:26,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:28,024 INFO L130 PetriNetUnfolder]: 8209/11836 cut-off events. [2023-08-29 22:39:28,024 INFO L131 PetriNetUnfolder]: For 6351/6351 co-relation queries the response was YES. [2023-08-29 22:39:28,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29726 conditions, 11836 events. 8209/11836 cut-off events. For 6351/6351 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 65158 event pairs, 4477 based on Foata normal form. 0/8016 useless extension candidates. Maximal degree in co-relation 29701. Up to 7512 conditions per place. [2023-08-29 22:39:28,075 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-29 22:39:28,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 85 transitions, 547 flow [2023-08-29 22:39:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:39:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:39:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1589 transitions. [2023-08-29 22:39:28,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192612137203166 [2023-08-29 22:39:28,077 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1589 transitions. [2023-08-29 22:39:28,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1589 transitions. [2023-08-29 22:39:28,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:28,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1589 transitions. [2023-08-29 22:39:28,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,082 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,082 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 267 flow. Second operand 5 states and 1589 transitions. [2023-08-29 22:39:28,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 85 transitions, 547 flow [2023-08-29 22:39:28,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 541 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:39:28,087 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 273 flow [2023-08-29 22:39:28,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-08-29 22:39:28,087 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-29 22:39:28,087 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 273 flow [2023-08-29 22:39:28,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.4) internal successors, (1537), 5 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:28,088 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:28,097 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 [2023-08-29 22:39:28,288 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 [2023-08-29 22:39:28,288 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:28,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:28,288 INFO L85 PathProgramCache]: Analyzing trace with hash 99005949, now seen corresponding path program 1 times [2023-08-29 22:39:28,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:28,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586334534] [2023-08-29 22:39:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:28,289 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 [2023-08-29 22:39:28,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:28,290 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) [2023-08-29 22:39:28,291 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 [2023-08-29 22:39:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:28,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:39:28,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:28,534 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:39:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:28,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:28,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586334534] [2023-08-29 22:39:28,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586334534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:28,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:28,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:39:28,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61060549] [2023-08-29 22:39:28,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:28,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:39:28,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:28,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:39:28,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:39:28,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 758 [2023-08-29 22:39:28,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:28,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:28,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 758 [2023-08-29 22:39:28,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:29,461 INFO L130 PetriNetUnfolder]: 5735/8304 cut-off events. [2023-08-29 22:39:29,461 INFO L131 PetriNetUnfolder]: For 5527/5527 co-relation queries the response was YES. [2023-08-29 22:39:29,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21953 conditions, 8304 events. 5735/8304 cut-off events. For 5527/5527 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 41806 event pairs, 4925 based on Foata normal form. 0/6360 useless extension candidates. Maximal degree in co-relation 21927. Up to 8286 conditions per place. [2023-08-29 22:39:29,494 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-29 22:39:29,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 54 transitions, 377 flow [2023-08-29 22:39:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:39:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:39:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1242 transitions. [2023-08-29 22:39:29,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096306068601583 [2023-08-29 22:39:29,497 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1242 transitions. [2023-08-29 22:39:29,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1242 transitions. [2023-08-29 22:39:29,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:29,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1242 transitions. [2023-08-29 22:39:29,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 310.5) internal successors, (1242), 4 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,500 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,500 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 273 flow. Second operand 4 states and 1242 transitions. [2023-08-29 22:39:29,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 54 transitions, 377 flow [2023-08-29 22:39:29,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 54 transitions, 369 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:39:29,506 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 265 flow [2023-08-29 22:39:29,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=265, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-08-29 22:39:29,506 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-08-29 22:39:29,506 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 265 flow [2023-08-29 22:39:29,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:29,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:29,507 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:29,516 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 [2023-08-29 22:39:29,716 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 [2023-08-29 22:39:29,716 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:29,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:29,716 INFO L85 PathProgramCache]: Analyzing trace with hash 655479316, now seen corresponding path program 1 times [2023-08-29 22:39:29,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:29,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174919292] [2023-08-29 22:39:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:29,717 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 [2023-08-29 22:39:29,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:29,718 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) [2023-08-29 22:39:29,718 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 [2023-08-29 22:39:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:30,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 22:39:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:30,138 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:39:30,139 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:39:30,204 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:39:30,204 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:39:30,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:30,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:30,266 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:30,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:30,297 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:39:30,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:30,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:32,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:32,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174919292] [2023-08-29 22:39:32,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174919292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:32,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:32,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:39:32,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465929372] [2023-08-29 22:39:32,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:32,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:39:32,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:32,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:39:32,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:39:35,267 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 [1] [2023-08-29 22:39:38,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 758 [2023-08-29 22:39:38,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 54 transitions, 265 flow. Second operand has 12 states, 12 states have (on average 299.3333333333333) internal successors, (3592), 12 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:38,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:38,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 758 [2023-08-29 22:39:38,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:40,636 INFO L130 PetriNetUnfolder]: 12371/17780 cut-off events. [2023-08-29 22:39:40,637 INFO L131 PetriNetUnfolder]: For 11255/11255 co-relation queries the response was YES. [2023-08-29 22:39:40,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45123 conditions, 17780 events. 12371/17780 cut-off events. For 11255/11255 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 98874 event pairs, 2065 based on Foata normal form. 798/14246 useless extension candidates. Maximal degree in co-relation 45097. Up to 4194 conditions per place. [2023-08-29 22:39:40,726 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 158 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2023-08-29 22:39:40,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 167 transitions, 1043 flow [2023-08-29 22:39:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:39:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:39:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2509 transitions. [2023-08-29 22:39:40,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137532981530343 [2023-08-29 22:39:40,728 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2509 transitions. [2023-08-29 22:39:40,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2509 transitions. [2023-08-29 22:39:40,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:40,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2509 transitions. [2023-08-29 22:39:40,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 313.625) internal successors, (2509), 8 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,734 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,734 INFO L175 Difference]: Start difference. First operand has 72 places, 54 transitions, 265 flow. Second operand 8 states and 2509 transitions. [2023-08-29 22:39:40,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 167 transitions, 1043 flow [2023-08-29 22:39:40,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 167 transitions, 1040 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:39:40,740 INFO L231 Difference]: Finished difference. Result has 81 places, 58 transitions, 317 flow [2023-08-29 22:39:40,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=81, PETRI_TRANSITIONS=58} [2023-08-29 22:39:40,741 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2023-08-29 22:39:40,741 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 58 transitions, 317 flow [2023-08-29 22:39:40,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 299.3333333333333) internal successors, (3592), 12 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:40,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:40,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:40,752 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 [2023-08-29 22:39:40,941 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 [2023-08-29 22:39:40,942 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:40,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:40,942 INFO L85 PathProgramCache]: Analyzing trace with hash 652748557, now seen corresponding path program 1 times [2023-08-29 22:39:40,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:40,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312965435] [2023-08-29 22:39:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:40,942 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 [2023-08-29 22:39:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:40,943 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) [2023-08-29 22:39:40,944 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 [2023-08-29 22:39:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:39:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:41,204 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:39:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:41,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:41,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:41,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312965435] [2023-08-29 22:39:41,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312965435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:41,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:41,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:39:41,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264762149] [2023-08-29 22:39:41,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:41,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:39:41,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:39:41,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:39:41,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 758 [2023-08-29 22:39:41,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 58 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 307.8) internal successors, (1539), 5 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:41,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:41,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 758 [2023-08-29 22:39:41,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:44,243 INFO L130 PetriNetUnfolder]: 18929/27160 cut-off events. [2023-08-29 22:39:44,243 INFO L131 PetriNetUnfolder]: For 30563/30563 co-relation queries the response was YES. [2023-08-29 22:39:44,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77776 conditions, 27160 events. 18929/27160 cut-off events. For 30563/30563 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 161702 event pairs, 10685 based on Foata normal form. 0/22196 useless extension candidates. Maximal degree in co-relation 77746. Up to 17762 conditions per place. [2023-08-29 22:39:44,355 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 86 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-08-29 22:39:44,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 90 transitions, 666 flow [2023-08-29 22:39:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:39:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:39:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1584 transitions. [2023-08-29 22:39:44,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179419525065963 [2023-08-29 22:39:44,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1584 transitions. [2023-08-29 22:39:44,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1584 transitions. [2023-08-29 22:39:44,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:44,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1584 transitions. [2023-08-29 22:39:44,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 316.8) internal successors, (1584), 5 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:44,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:44,360 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:44,361 INFO L175 Difference]: Start difference. First operand has 81 places, 58 transitions, 317 flow. Second operand 5 states and 1584 transitions. [2023-08-29 22:39:44,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 90 transitions, 666 flow [2023-08-29 22:39:44,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 643 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-29 22:39:44,390 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 320 flow [2023-08-29 22:39:44,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2023-08-29 22:39:44,390 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2023-08-29 22:39:44,390 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 320 flow [2023-08-29 22:39:44,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.8) internal successors, (1539), 5 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:44,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:44,391 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:44,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:44,591 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 [2023-08-29 22:39:44,591 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:44,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash 655479384, now seen corresponding path program 1 times [2023-08-29 22:39:44,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:44,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714520493] [2023-08-29 22:39:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:44,592 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 [2023-08-29 22:39:44,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:44,593 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) [2023-08-29 22:39:44,593 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 [2023-08-29 22:39:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:39:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:44,861 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:39:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:44,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:45,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:45,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714520493] [2023-08-29 22:39:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714520493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:45,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:45,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:39:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401472301] [2023-08-29 22:39:45,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:45,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:39:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:39:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:39:47,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-08-29 22:39:47,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 320 flow. Second operand has 10 states, 10 states have (on average 306.4) internal successors, (3064), 10 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:47,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:47,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-08-29 22:39:47,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:50,059 INFO L130 PetriNetUnfolder]: 17573/25400 cut-off events. [2023-08-29 22:39:50,059 INFO L131 PetriNetUnfolder]: For 28098/28098 co-relation queries the response was YES. [2023-08-29 22:39:50,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74508 conditions, 25400 events. 17573/25400 cut-off events. For 28098/28098 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 150987 event pairs, 5029 based on Foata normal form. 1212/23248 useless extension candidates. Maximal degree in co-relation 74477. Up to 8390 conditions per place. [2023-08-29 22:39:50,184 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 163 selfloop transitions, 7 changer transitions 0/170 dead transitions. [2023-08-29 22:39:50,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 170 transitions, 1136 flow [2023-08-29 22:39:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:39:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:39:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2563 transitions. [2023-08-29 22:39:50,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42265831134564646 [2023-08-29 22:39:50,187 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2563 transitions. [2023-08-29 22:39:50,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2563 transitions. [2023-08-29 22:39:50,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:50,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2563 transitions. [2023-08-29 22:39:50,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 320.375) internal successors, (2563), 8 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:50,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:50,193 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:50,193 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 320 flow. Second operand 8 states and 2563 transitions. [2023-08-29 22:39:50,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 170 transitions, 1136 flow [2023-08-29 22:39:50,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1120 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:39:50,268 INFO L231 Difference]: Finished difference. Result has 87 places, 59 transitions, 330 flow [2023-08-29 22:39:50,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=87, PETRI_TRANSITIONS=59} [2023-08-29 22:39:50,268 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 22 predicate places. [2023-08-29 22:39:50,268 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 59 transitions, 330 flow [2023-08-29 22:39:50,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 306.4) internal successors, (3064), 10 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:50,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:50,269 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:50,278 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 (26)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:50,469 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 [2023-08-29 22:39:50,469 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:50,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash 652748412, now seen corresponding path program 1 times [2023-08-29 22:39:50,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:50,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954008623] [2023-08-29 22:39:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:50,470 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 [2023-08-29 22:39:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:50,471 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) [2023-08-29 22:39:50,472 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 [2023-08-29 22:39:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:50,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:39:50,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:50,801 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:39:50,804 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:39:50,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:50,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:50,847 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:50,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:50,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:50,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954008623] [2023-08-29 22:39:50,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954008623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:50,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:50,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:39:50,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209075811] [2023-08-29 22:39:50,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:50,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:39:50,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:39:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:39:51,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 758 [2023-08-29 22:39:51,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 59 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 301.8) internal successors, (1509), 5 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:51,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:51,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 758 [2023-08-29 22:39:51,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:53,451 INFO L130 PetriNetUnfolder]: 15543/22492 cut-off events. [2023-08-29 22:39:53,451 INFO L131 PetriNetUnfolder]: For 26713/26713 co-relation queries the response was YES. [2023-08-29 22:39:53,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67840 conditions, 22492 events. 15543/22492 cut-off events. For 26713/26713 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 130903 event pairs, 10121 based on Foata normal form. 0/20088 useless extension candidates. Maximal degree in co-relation 67809. Up to 16614 conditions per place. [2023-08-29 22:39:53,574 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 85 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-08-29 22:39:53,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 675 flow [2023-08-29 22:39:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:39:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:39:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1553 transitions. [2023-08-29 22:39:53,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40976253298153037 [2023-08-29 22:39:53,577 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1553 transitions. [2023-08-29 22:39:53,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1553 transitions. [2023-08-29 22:39:53,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:53,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1553 transitions. [2023-08-29 22:39:53,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:53,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:53,580 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:53,580 INFO L175 Difference]: Start difference. First operand has 87 places, 59 transitions, 330 flow. Second operand 5 states and 1553 transitions. [2023-08-29 22:39:53,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 675 flow [2023-08-29 22:39:53,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 655 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:39:53,605 INFO L231 Difference]: Finished difference. Result has 86 places, 59 transitions, 330 flow [2023-08-29 22:39:53,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=86, PETRI_TRANSITIONS=59} [2023-08-29 22:39:53,606 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 21 predicate places. [2023-08-29 22:39:53,606 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 59 transitions, 330 flow [2023-08-29 22:39:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 301.8) internal successors, (1509), 5 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:53,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:53,606 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:53,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:53,806 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 [2023-08-29 22:39:53,806 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:39:53,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1239625657, now seen corresponding path program 1 times [2023-08-29 22:39:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:53,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25323004] [2023-08-29 22:39:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:53,807 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 [2023-08-29 22:39:53,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:53,808 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) [2023-08-29 22:39:53,809 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 [2023-08-29 22:39:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:39:54,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:54,172 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:39:54,176 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:39:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:54,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:54,223 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:39:54,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:39:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:54,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:39:54,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:54,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25323004] [2023-08-29 22:39:54,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25323004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:54,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:54,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:39:54,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016727350] [2023-08-29 22:39:54,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:54,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:39:54,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:39:54,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:39:56,694 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 [1] [2023-08-29 22:39:58,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:01,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:03,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:05,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:08,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:11,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:14,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:16,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:18,881 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 [1] [2023-08-29 22:40:19,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 758 [2023-08-29 22:40:19,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 59 transitions, 330 flow. Second operand has 10 states, 10 states have (on average 290.8) internal successors, (2908), 10 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:19,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:19,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 758 [2023-08-29 22:40:19,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:24,649 INFO L130 PetriNetUnfolder]: 32661/46784 cut-off events. [2023-08-29 22:40:24,649 INFO L131 PetriNetUnfolder]: For 59727/59727 co-relation queries the response was YES. [2023-08-29 22:40:24,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141485 conditions, 46784 events. 32661/46784 cut-off events. For 59727/59727 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 297612 event pairs, 8173 based on Foata normal form. 2634/44602 useless extension candidates. Maximal degree in co-relation 141453. Up to 13706 conditions per place. [2023-08-29 22:40:24,937 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 177 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2023-08-29 22:40:24,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 185 transitions, 1360 flow [2023-08-29 22:40:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:40:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:40:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2430 transitions. [2023-08-29 22:40:24,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007255936675462 [2023-08-29 22:40:24,940 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2430 transitions. [2023-08-29 22:40:24,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2430 transitions. [2023-08-29 22:40:24,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:24,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2430 transitions. [2023-08-29 22:40:24,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 303.75) internal successors, (2430), 8 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,946 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,946 INFO L175 Difference]: Start difference. First operand has 86 places, 59 transitions, 330 flow. Second operand 8 states and 2430 transitions. [2023-08-29 22:40:24,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 185 transitions, 1360 flow [2023-08-29 22:40:24,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 185 transitions, 1352 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:40:24,989 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 375 flow [2023-08-29 22:40:24,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=93, PETRI_TRANSITIONS=63} [2023-08-29 22:40:24,990 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 28 predicate places. [2023-08-29 22:40:24,990 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 375 flow [2023-08-29 22:40:24,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 290.8) internal successors, (2908), 10 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:24,990 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:25,000 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 (28)] Ended with exit code 0 [2023-08-29 22:40:25,190 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 [2023-08-29 22:40:25,191 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:40:25,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:25,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1239625512, now seen corresponding path program 1 times [2023-08-29 22:40:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:25,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691951275] [2023-08-29 22:40:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:25,192 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 [2023-08-29 22:40:25,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:25,192 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) [2023-08-29 22:40:25,193 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 [2023-08-29 22:40:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:25,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:40:25,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:25,482 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:40:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:40:25,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:40:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:40:25,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:25,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691951275] [2023-08-29 22:40:25,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691951275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:40:25,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:40:25,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:40:25,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053011753] [2023-08-29 22:40:25,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:40:25,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:40:25,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:25,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:40:25,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:40:27,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-08-29 22:40:27,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 63 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 306.6) internal successors, (3066), 10 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:27,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:27,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-08-29 22:40:27,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:32,850 INFO L130 PetriNetUnfolder]: 27723/40090 cut-off events. [2023-08-29 22:40:32,850 INFO L131 PetriNetUnfolder]: For 65488/65488 co-relation queries the response was YES. [2023-08-29 22:40:33,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132453 conditions, 40090 events. 27723/40090 cut-off events. For 65488/65488 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 253778 event pairs, 10121 based on Foata normal form. 2634/41584 useless extension candidates. Maximal degree in co-relation 132417. Up to 16608 conditions per place. [2023-08-29 22:40:33,102 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 175 selfloop transitions, 7 changer transitions 0/182 dead transitions. [2023-08-29 22:40:33,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 1369 flow [2023-08-29 22:40:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:40:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:40:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2555 transitions. [2023-08-29 22:40:33,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42133905013192613 [2023-08-29 22:40:33,105 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2555 transitions. [2023-08-29 22:40:33,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2555 transitions. [2023-08-29 22:40:33,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:33,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2555 transitions. [2023-08-29 22:40:33,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 319.375) internal successors, (2555), 8 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:33,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:33,110 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:33,110 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 375 flow. Second operand 8 states and 2555 transitions. [2023-08-29 22:40:33,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 1369 flow [2023-08-29 22:40:33,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 182 transitions, 1348 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-29 22:40:33,468 INFO L231 Difference]: Finished difference. Result has 95 places, 62 transitions, 362 flow [2023-08-29 22:40:33,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=362, PETRI_PLACES=95, PETRI_TRANSITIONS=62} [2023-08-29 22:40:33,469 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 30 predicate places. [2023-08-29 22:40:33,469 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 62 transitions, 362 flow [2023-08-29 22:40:33,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 306.6) internal successors, (3066), 10 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:33,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:33,470 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:33,481 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 [2023-08-29 22:40:33,672 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 [2023-08-29 22:40:33,672 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:40:33,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2054984211, now seen corresponding path program 2 times [2023-08-29 22:40:33,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:33,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619586529] [2023-08-29 22:40:33,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:40:33,673 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 [2023-08-29 22:40:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:33,674 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) [2023-08-29 22:40:33,676 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 [2023-08-29 22:40:33,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:40:33,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:33,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-29 22:40:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:33,916 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:40:33,916 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:40:33,991 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:40:33,991 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:40:34,058 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:40:34,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:40:34,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:40:34,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:34,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-08-29 22:40:34,184 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-29 22:40:34,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-08-29 22:40:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-29 22:40:34,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:34,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:34,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619586529] [2023-08-29 22:40:34,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619586529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:34,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:34,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:40:34,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079210407] [2023-08-29 22:40:34,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:34,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:40:34,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:40:34,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:40:35,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 758 [2023-08-29 22:40:35,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 62 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 300.4) internal successors, (1502), 5 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:35,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:35,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 758 [2023-08-29 22:40:35,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:39,590 INFO L130 PetriNetUnfolder]: 26479/38340 cut-off events. [2023-08-29 22:40:39,591 INFO L131 PetriNetUnfolder]: For 57750/57750 co-relation queries the response was YES. [2023-08-29 22:40:39,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122933 conditions, 38340 events. 26479/38340 cut-off events. For 57750/57750 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 236781 event pairs, 24525 based on Foata normal form. 0/37734 useless extension candidates. Maximal degree in co-relation 122899. Up to 38328 conditions per place. [2023-08-29 22:40:39,840 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 58 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-08-29 22:40:39,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 61 transitions, 478 flow [2023-08-29 22:40:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:40:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:40:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1526 transitions. [2023-08-29 22:40:39,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40263852242744064 [2023-08-29 22:40:39,843 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1526 transitions. [2023-08-29 22:40:39,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1526 transitions. [2023-08-29 22:40:39,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:39,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1526 transitions. [2023-08-29 22:40:39,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.2) internal successors, (1526), 5 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:39,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:39,846 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:39,846 INFO L175 Difference]: Start difference. First operand has 95 places, 62 transitions, 362 flow. Second operand 5 states and 1526 transitions. [2023-08-29 22:40:39,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 61 transitions, 478 flow [2023-08-29 22:40:39,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 61 transitions, 463 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 22:40:39,956 INFO L231 Difference]: Finished difference. Result has 91 places, 61 transitions, 347 flow [2023-08-29 22:40:39,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=91, PETRI_TRANSITIONS=61} [2023-08-29 22:40:39,956 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-08-29 22:40:39,957 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 61 transitions, 347 flow [2023-08-29 22:40:39,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.4) internal successors, (1502), 5 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:39,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:39,957 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:39,963 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 (30)] Ended with exit code 0 [2023-08-29 22:40:40,158 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 [2023-08-29 22:40:40,158 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:40:40,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2054984148, now seen corresponding path program 2 times [2023-08-29 22:40:40,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:40,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198290711] [2023-08-29 22:40:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:40:40,159 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 [2023-08-29 22:40:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:40,160 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) [2023-08-29 22:40:40,161 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 [2023-08-29 22:40:40,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:40:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:40:40,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 22:40:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:40,568 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:40:40,568 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:40:40,633 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:40:40,633 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:40:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:40,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:40:40,695 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:40:40,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:40:40,772 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-29 22:40:40,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-08-29 22:40:40,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:40:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:40:40,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:40:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:40:44,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:44,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198290711] [2023-08-29 22:40:44,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198290711] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:40:44,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:40:44,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-08-29 22:40:44,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449318534] [2023-08-29 22:40:44,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:40:44,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 22:40:44,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 22:40:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=274, Unknown=1, NotChecked=0, Total=342 [2023-08-29 22:40:47,002 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 [1] [2023-08-29 22:40:49,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:51,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:53,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:56,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:40:58,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:00,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:02,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:05,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:07,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:10,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:13,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:15,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:17,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:19,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:21,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:24,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:26,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:29,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:32,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:34,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:35,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 758 [2023-08-29 22:41:35,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 61 transitions, 347 flow. Second operand has 19 states, 19 states have (on average 267.89473684210526) internal successors, (5090), 19 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:35,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:41:35,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 758 [2023-08-29 22:41:35,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:41:42,448 INFO L130 PetriNetUnfolder]: 31277/45304 cut-off events. [2023-08-29 22:41:42,448 INFO L131 PetriNetUnfolder]: For 69117/69117 co-relation queries the response was YES. [2023-08-29 22:41:42,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139523 conditions, 45304 events. 31277/45304 cut-off events. For 69117/69117 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 292699 event pairs, 5209 based on Foata normal form. 506/45094 useless extension candidates. Maximal degree in co-relation 139489. Up to 8728 conditions per place. [2023-08-29 22:41:42,769 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 241 selfloop transitions, 10 changer transitions 0/251 dead transitions. [2023-08-29 22:41:42,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 251 transitions, 1740 flow [2023-08-29 22:41:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:41:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:41:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2837 transitions. [2023-08-29 22:41:42,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37427440633245385 [2023-08-29 22:41:42,773 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2837 transitions. [2023-08-29 22:41:42,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2837 transitions. [2023-08-29 22:41:42,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:41:42,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2837 transitions. [2023-08-29 22:41:42,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 283.7) internal successors, (2837), 10 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:42,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:42,778 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:42,778 INFO L175 Difference]: Start difference. First operand has 91 places, 61 transitions, 347 flow. Second operand 10 states and 2837 transitions. [2023-08-29 22:41:42,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 251 transitions, 1740 flow [2023-08-29 22:41:42,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 251 transitions, 1735 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:41:42,912 INFO L231 Difference]: Finished difference. Result has 99 places, 63 transitions, 387 flow [2023-08-29 22:41:42,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=387, PETRI_PLACES=99, PETRI_TRANSITIONS=63} [2023-08-29 22:41:42,913 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-08-29 22:41:42,913 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 63 transitions, 387 flow [2023-08-29 22:41:42,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 267.89473684210526) internal successors, (5090), 19 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:42,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:41:42,914 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:41:42,927 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 [2023-08-29 22:41:43,122 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 [2023-08-29 22:41:43,123 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:41:43,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:41:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1549156036, now seen corresponding path program 2 times [2023-08-29 22:41:43,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:41:43,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871791123] [2023-08-29 22:41:43,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:41:43,124 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 [2023-08-29 22:41:43,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:41:43,125 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) [2023-08-29 22:41:43,125 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 (32)] Waiting until timeout for monitored process [2023-08-29 22:41:43,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:41:43,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:41:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:41:43,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:41:43,511 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:41:43,515 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:41:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:41:43,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:41:43,561 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:41:43,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:41:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:41:43,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:41:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:41:44,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:41:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871791123] [2023-08-29 22:41:44,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871791123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:41:44,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:41:44,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-29 22:41:44,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845126163] [2023-08-29 22:41:44,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:41:44,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:41:44,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:41:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:41:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-29 22:41:48,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:51,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:55,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:58,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:01,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:02,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 758 [2023-08-29 22:42:02,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 63 transitions, 387 flow. Second operand has 16 states, 16 states have (on average 296.125) internal successors, (4738), 16 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:02,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:02,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 758 [2023-08-29 22:42:02,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:10,515 INFO L130 PetriNetUnfolder]: 38153/55228 cut-off events. [2023-08-29 22:42:10,515 INFO L131 PetriNetUnfolder]: For 112370/112370 co-relation queries the response was YES. [2023-08-29 22:42:10,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175803 conditions, 55228 events. 38153/55228 cut-off events. For 112370/112370 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 362815 event pairs, 9223 based on Foata normal form. 996/55352 useless extension candidates. Maximal degree in co-relation 175767. Up to 15460 conditions per place. [2023-08-29 22:42:11,001 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 239 selfloop transitions, 9 changer transitions 0/248 dead transitions. [2023-08-29 22:42:11,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 248 transitions, 2042 flow [2023-08-29 22:42:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:42:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:42:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3093 transitions. [2023-08-29 22:42:11,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40804749340369395 [2023-08-29 22:42:11,005 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3093 transitions. [2023-08-29 22:42:11,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3093 transitions. [2023-08-29 22:42:11,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:11,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3093 transitions. [2023-08-29 22:42:11,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 309.3) internal successors, (3093), 10 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:11,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:11,010 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:11,011 INFO L175 Difference]: Start difference. First operand has 99 places, 63 transitions, 387 flow. Second operand 10 states and 3093 transitions. [2023-08-29 22:42:11,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 248 transitions, 2042 flow [2023-08-29 22:42:11,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 248 transitions, 1940 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-29 22:42:11,587 INFO L231 Difference]: Finished difference. Result has 103 places, 65 transitions, 407 flow [2023-08-29 22:42:11,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=407, PETRI_PLACES=103, PETRI_TRANSITIONS=65} [2023-08-29 22:42:11,587 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 38 predicate places. [2023-08-29 22:42:11,587 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 65 transitions, 407 flow [2023-08-29 22:42:11,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 296.125) internal successors, (4738), 16 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:11,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:11,588 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:11,603 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 [2023-08-29 22:42:11,792 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 [2023-08-29 22:42:11,792 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:11,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1549155891, now seen corresponding path program 2 times [2023-08-29 22:42:11,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961440085] [2023-08-29 22:42:11,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:42:11,793 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 [2023-08-29 22:42:11,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:11,794 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) [2023-08-29 22:42:11,795 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 [2023-08-29 22:42:12,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:42:12,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:42:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:42:12,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:12,018 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:42:12,051 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:42:12,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:42:12,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:12,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961440085] [2023-08-29 22:42:12,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961440085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:12,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:12,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:42:12,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499434960] [2023-08-29 22:42:12,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:12,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:12,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:12,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:12,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:12,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 758 [2023-08-29 22:42:12,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 65 transitions, 407 flow. Second operand has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:12,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:12,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 758 [2023-08-29 22:42:12,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:18,191 INFO L130 PetriNetUnfolder]: 33569/48652 cut-off events. [2023-08-29 22:42:18,191 INFO L131 PetriNetUnfolder]: For 89841/89841 co-relation queries the response was YES. [2023-08-29 22:42:18,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162915 conditions, 48652 events. 33569/48652 cut-off events. For 89841/89841 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 308920 event pairs, 31263 based on Foata normal form. 1992/49876 useless extension candidates. Maximal degree in co-relation 162877. Up to 48634 conditions per place. [2023-08-29 22:42:18,619 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 60 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-08-29 22:42:18,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 63 transitions, 520 flow [2023-08-29 22:42:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:42:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:42:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1565 transitions. [2023-08-29 22:42:18,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129287598944591 [2023-08-29 22:42:18,622 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1565 transitions. [2023-08-29 22:42:18,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1565 transitions. [2023-08-29 22:42:18,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:18,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1565 transitions. [2023-08-29 22:42:18,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:18,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:18,625 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:18,625 INFO L175 Difference]: Start difference. First operand has 103 places, 65 transitions, 407 flow. Second operand 5 states and 1565 transitions. [2023-08-29 22:42:18,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 63 transitions, 520 flow [2023-08-29 22:42:18,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 63 transitions, 501 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-29 22:42:19,000 INFO L231 Difference]: Finished difference. Result has 97 places, 63 transitions, 381 flow [2023-08-29 22:42:19,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=97, PETRI_TRANSITIONS=63} [2023-08-29 22:42:19,001 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-08-29 22:42:19,001 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 63 transitions, 381 flow [2023-08-29 22:42:19,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:19,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:19,001 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:19,015 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 (33)] Ended with exit code 0 [2023-08-29 22:42:19,209 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 [2023-08-29 22:42:19,209 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:19,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:19,210 INFO L85 PathProgramCache]: Analyzing trace with hash -779186809, now seen corresponding path program 3 times [2023-08-29 22:42:19,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:19,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642964224] [2023-08-29 22:42:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:42:19,210 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 [2023-08-29 22:42:19,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:19,211 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) [2023-08-29 22:42:19,213 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 [2023-08-29 22:42:19,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 22:42:19,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:42:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:42:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:19,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:42:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:20,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:20,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642964224] [2023-08-29 22:42:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642964224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:42:20,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:42:20,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:42:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362156938] [2023-08-29 22:42:20,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:42:20,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:42:20,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:42:20,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:42:20,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 758 [2023-08-29 22:42:20,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 63 transitions, 381 flow. Second operand has 14 states, 14 states have (on average 320.85714285714283) internal successors, (4492), 14 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:20,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:20,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 758 [2023-08-29 22:42:20,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:26,668 INFO L130 PetriNetUnfolder]: 30281/44368 cut-off events. [2023-08-29 22:42:26,669 INFO L131 PetriNetUnfolder]: For 75552/75552 co-relation queries the response was YES. [2023-08-29 22:42:26,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137703 conditions, 44368 events. 30281/44368 cut-off events. For 75552/75552 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 291349 event pairs, 2611 based on Foata normal form. 1992/45644 useless extension candidates. Maximal degree in co-relation 137666. Up to 6636 conditions per place. [2023-08-29 22:42:27,152 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 238 selfloop transitions, 6 changer transitions 0/244 dead transitions. [2023-08-29 22:42:27,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 244 transitions, 1918 flow [2023-08-29 22:42:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:42:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:42:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2702 transitions. [2023-08-29 22:42:27,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44558047493403696 [2023-08-29 22:42:27,155 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2702 transitions. [2023-08-29 22:42:27,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2702 transitions. [2023-08-29 22:42:27,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:27,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2702 transitions. [2023-08-29 22:42:27,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 337.75) internal successors, (2702), 8 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,160 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,160 INFO L175 Difference]: Start difference. First operand has 97 places, 63 transitions, 381 flow. Second operand 8 states and 2702 transitions. [2023-08-29 22:42:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 244 transitions, 1918 flow [2023-08-29 22:42:27,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 244 transitions, 1900 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 22:42:27,763 INFO L231 Difference]: Finished difference. Result has 94 places, 61 transitions, 357 flow [2023-08-29 22:42:27,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=357, PETRI_PLACES=94, PETRI_TRANSITIONS=61} [2023-08-29 22:42:27,763 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 29 predicate places. [2023-08-29 22:42:27,763 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 61 transitions, 357 flow [2023-08-29 22:42:27,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 320.85714285714283) internal successors, (4492), 14 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:27,764 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:27,778 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 (34)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:27,969 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 [2023-08-29 22:42:27,970 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:27,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2008247313, now seen corresponding path program 2 times [2023-08-29 22:42:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:27,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188525013] [2023-08-29 22:42:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:42:27,971 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 [2023-08-29 22:42:27,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:27,972 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) [2023-08-29 22:42:27,973 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 [2023-08-29 22:42:28,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:42:28,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:42:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 22:42:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:28,292 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:42:28,292 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:42:28,362 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:42:28,362 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:42:28,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:28,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:28,439 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:42:28,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:42:28,478 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:42:28,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-29 22:42:28,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:28,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:28,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188525013] [2023-08-29 22:42:28,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188525013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:28,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:28,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:42:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468207422] [2023-08-29 22:42:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:28,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:42:28,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:28,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:42:28,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:42:29,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 758 [2023-08-29 22:42:29,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 61 transitions, 357 flow. Second operand has 6 states, 6 states have (on average 299.3333333333333) internal successors, (1796), 6 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:29,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:29,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 758 [2023-08-29 22:42:29,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:33,806 INFO L130 PetriNetUnfolder]: 28641/42012 cut-off events. [2023-08-29 22:42:33,806 INFO L131 PetriNetUnfolder]: For 48787/48787 co-relation queries the response was YES. [2023-08-29 22:42:34,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129951 conditions, 42012 events. 28641/42012 cut-off events. For 48787/48787 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 269393 event pairs, 27447 based on Foata normal form. 0/42012 useless extension candidates. Maximal degree in co-relation 129920. Up to 41994 conditions per place. [2023-08-29 22:42:34,134 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 57 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-29 22:42:34,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 60 transitions, 471 flow [2023-08-29 22:42:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:42:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:42:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1518 transitions. [2023-08-29 22:42:34,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40052770448548813 [2023-08-29 22:42:34,136 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1518 transitions. [2023-08-29 22:42:34,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1518 transitions. [2023-08-29 22:42:34,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:34,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1518 transitions. [2023-08-29 22:42:34,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 303.6) internal successors, (1518), 5 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:34,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:34,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:34,139 INFO L175 Difference]: Start difference. First operand has 94 places, 61 transitions, 357 flow. Second operand 5 states and 1518 transitions. [2023-08-29 22:42:34,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 60 transitions, 471 flow [2023-08-29 22:42:34,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 60 transitions, 460 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:42:34,233 INFO L231 Difference]: Finished difference. Result has 91 places, 60 transitions, 346 flow [2023-08-29 22:42:34,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=91, PETRI_TRANSITIONS=60} [2023-08-29 22:42:34,234 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-08-29 22:42:34,234 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 60 transitions, 346 flow [2023-08-29 22:42:34,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 299.3333333333333) internal successors, (1796), 6 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:34,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:34,234 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:34,243 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 (35)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:34,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /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 [2023-08-29 22:42:34,435 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:34,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2008247381, now seen corresponding path program 2 times [2023-08-29 22:42:34,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:34,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464713926] [2023-08-29 22:42:34,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:42:34,435 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 [2023-08-29 22:42:34,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:34,436 INFO L229 MonitoredProcess]: Starting monitored process 36 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) [2023-08-29 22:42:34,437 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 (36)] Waiting until timeout for monitored process [2023-08-29 22:42:34,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:42:34,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:42:34,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 22:42:34,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:34,905 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:42:34,905 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:42:34,983 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:42:34,983 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:42:35,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:35,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:35,198 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:42:35,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:42:35,300 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:42:35,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:42:35,322 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-29 22:42:35,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-08-29 22:42:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:35,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:42:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:38,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:38,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464713926] [2023-08-29 22:42:38,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464713926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:42:38,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:42:38,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-08-29 22:42:38,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703355158] [2023-08-29 22:42:38,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:42:38,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 22:42:38,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:38,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 22:42:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=274, Unknown=1, NotChecked=0, Total=342 [2023-08-29 22:42:40,512 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 [1] [2023-08-29 22:42:42,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:45,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:47,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:51,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:53,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:56,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:58,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:00,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:02,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:04,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:06,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:08,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:12,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:14,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:16,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:18,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:21,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:23,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:27,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:29,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:31,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:33,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:35,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:37,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:40,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:42,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:44,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:47,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:49,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:52,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:55,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:57,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:00,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:03,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:03,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 758 [2023-08-29 22:44:03,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 60 transitions, 346 flow. Second operand has 19 states, 19 states have (on average 268.10526315789474) internal successors, (5094), 19 states have internal predecessors, (5094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:03,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:03,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 758 [2023-08-29 22:44:03,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:10,706 INFO L130 PetriNetUnfolder]: 33705/49452 cut-off events. [2023-08-29 22:44:10,706 INFO L131 PetriNetUnfolder]: For 64565/64565 co-relation queries the response was YES. [2023-08-29 22:44:10,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147786 conditions, 49452 events. 33705/49452 cut-off events. For 64565/64565 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 326238 event pairs, 5915 based on Foata normal form. 716/50168 useless extension candidates. Maximal degree in co-relation 147754. Up to 9890 conditions per place. [2023-08-29 22:44:11,097 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 224 selfloop transitions, 10 changer transitions 0/234 dead transitions. [2023-08-29 22:44:11,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 234 transitions, 1662 flow [2023-08-29 22:44:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:44:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:44:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2806 transitions. [2023-08-29 22:44:11,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37018469656992087 [2023-08-29 22:44:11,101 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2806 transitions. [2023-08-29 22:44:11,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2806 transitions. [2023-08-29 22:44:11,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:11,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2806 transitions. [2023-08-29 22:44:11,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 280.6) internal successors, (2806), 10 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:11,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:11,106 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:11,106 INFO L175 Difference]: Start difference. First operand has 91 places, 60 transitions, 346 flow. Second operand 10 states and 2806 transitions. [2023-08-29 22:44:11,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 234 transitions, 1662 flow [2023-08-29 22:44:11,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 234 transitions, 1657 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:44:11,428 INFO L231 Difference]: Finished difference. Result has 99 places, 62 transitions, 386 flow [2023-08-29 22:44:11,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=386, PETRI_PLACES=99, PETRI_TRANSITIONS=62} [2023-08-29 22:44:11,429 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-08-29 22:44:11,429 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 62 transitions, 386 flow [2023-08-29 22:44:11,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 268.10526315789474) internal successors, (5094), 19 states have internal predecessors, (5094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:11,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:11,430 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:11,440 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 (36)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:11,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /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 [2023-08-29 22:44:11,630 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:11,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:11,630 INFO L85 PathProgramCache]: Analyzing trace with hash -845087589, now seen corresponding path program 3 times [2023-08-29 22:44:11,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:11,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733863680] [2023-08-29 22:44:11,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:44:11,631 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 [2023-08-29 22:44:11,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:11,632 INFO L229 MonitoredProcess]: Starting monitored process 37 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) [2023-08-29 22:44:11,635 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 (37)] Waiting until timeout for monitored process [2023-08-29 22:44:12,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 22:44:12,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:12,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:44:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:12,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:44:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:12,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:12,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733863680] [2023-08-29 22:44:12,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733863680] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:44:12,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:44:12,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:44:12,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757956424] [2023-08-29 22:44:12,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:44:12,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:44:12,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:44:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:44:12,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 758 [2023-08-29 22:44:12,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 62 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 321.2857142857143) internal successors, (4498), 14 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:12,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:12,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 758 [2023-08-29 22:44:12,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:19,393 INFO L130 PetriNetUnfolder]: 30459/45082 cut-off events. [2023-08-29 22:44:19,393 INFO L131 PetriNetUnfolder]: For 80395/80395 co-relation queries the response was YES. [2023-08-29 22:44:19,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138682 conditions, 45082 events. 30459/45082 cut-off events. For 80395/80395 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 300110 event pairs, 753 based on Foata normal form. 1124/46206 useless extension candidates. Maximal degree in co-relation 138648. Up to 7604 conditions per place. [2023-08-29 22:44:19,700 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 235 selfloop transitions, 6 changer transitions 0/241 dead transitions. [2023-08-29 22:44:19,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 241 transitions, 1781 flow [2023-08-29 22:44:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:44:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:44:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2706 transitions. [2023-08-29 22:44:19,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462401055408971 [2023-08-29 22:44:19,704 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2706 transitions. [2023-08-29 22:44:19,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2706 transitions. [2023-08-29 22:44:19,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:19,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2706 transitions. [2023-08-29 22:44:19,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 338.25) internal successors, (2706), 8 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:19,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:19,708 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:19,708 INFO L175 Difference]: Start difference. First operand has 99 places, 62 transitions, 386 flow. Second operand 8 states and 2706 transitions. [2023-08-29 22:44:19,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 241 transitions, 1781 flow [2023-08-29 22:44:19,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 241 transitions, 1665 flow, removed 14 selfloop flow, removed 13 redundant places. [2023-08-29 22:44:19,915 INFO L231 Difference]: Finished difference. Result has 91 places, 59 transitions, 336 flow [2023-08-29 22:44:19,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=91, PETRI_TRANSITIONS=59} [2023-08-29 22:44:19,916 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-08-29 22:44:19,916 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 59 transitions, 336 flow [2023-08-29 22:44:19,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 321.2857142857143) internal successors, (4498), 14 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:19,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:19,916 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:19,930 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 (37)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:20,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /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 [2023-08-29 22:44:20,117 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:20,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1485307128, now seen corresponding path program 3 times [2023-08-29 22:44:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634941772] [2023-08-29 22:44:20,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:44:20,118 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 [2023-08-29 22:44:20,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:20,119 INFO L229 MonitoredProcess]: Starting monitored process 38 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) [2023-08-29 22:44:20,119 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 (38)] Waiting until timeout for monitored process [2023-08-29 22:44:21,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 22:44:21,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:21,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:44:21,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:21,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:44:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:21,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:21,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634941772] [2023-08-29 22:44:21,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634941772] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:44:21,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:44:21,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:44:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220427905] [2023-08-29 22:44:21,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:44:21,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:44:21,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:44:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:44:21,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 758 [2023-08-29 22:44:21,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 59 transitions, 336 flow. Second operand has 14 states, 14 states have (on average 321.42857142857144) internal successors, (4500), 14 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:21,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:21,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 758 [2023-08-29 22:44:21,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:26,982 INFO L130 PetriNetUnfolder]: 26843/40146 cut-off events. [2023-08-29 22:44:26,982 INFO L131 PetriNetUnfolder]: For 37520/37520 co-relation queries the response was YES. [2023-08-29 22:44:27,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113800 conditions, 40146 events. 26843/40146 cut-off events. For 37520/37520 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 266763 event pairs, 853 based on Foata normal form. 1320/41466 useless extension candidates. Maximal degree in co-relation 113773. Up to 6786 conditions per place. [2023-08-29 22:44:27,243 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 204 selfloop transitions, 6 changer transitions 0/210 dead transitions. [2023-08-29 22:44:27,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 210 transitions, 1368 flow [2023-08-29 22:44:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:44:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:44:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2689 transitions. [2023-08-29 22:44:27,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434366754617414 [2023-08-29 22:44:27,246 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2689 transitions. [2023-08-29 22:44:27,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2689 transitions. [2023-08-29 22:44:27,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:27,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2689 transitions. [2023-08-29 22:44:27,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 336.125) internal successors, (2689), 8 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:27,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:27,250 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:27,250 INFO L175 Difference]: Start difference. First operand has 91 places, 59 transitions, 336 flow. Second operand 8 states and 2689 transitions. [2023-08-29 22:44:27,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 210 transitions, 1368 flow [2023-08-29 22:44:27,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 210 transitions, 1276 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 22:44:27,532 INFO L231 Difference]: Finished difference. Result has 84 places, 56 transitions, 292 flow [2023-08-29 22:44:27,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=84, PETRI_TRANSITIONS=56} [2023-08-29 22:44:27,532 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2023-08-29 22:44:27,532 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 56 transitions, 292 flow [2023-08-29 22:44:27,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 321.42857142857144) internal successors, (4500), 14 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:27,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:27,533 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:27,547 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 (38)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:27,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /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 [2023-08-29 22:44:27,733 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:27,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:27,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2146159944, now seen corresponding path program 1 times [2023-08-29 22:44:27,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:27,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198403477] [2023-08-29 22:44:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:44:27,734 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 [2023-08-29 22:44:27,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:27,735 INFO L229 MonitoredProcess]: Starting monitored process 39 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) [2023-08-29 22:44:27,735 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 (39)] Waiting until timeout for monitored process [2023-08-29 22:44:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:44:28,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:44:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:28,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:44:28,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:28,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198403477] [2023-08-29 22:44:28,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198403477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:44:28,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:44:28,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:44:28,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324030659] [2023-08-29 22:44:28,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:44:28,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:44:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:28,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:44:28,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:44:28,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 758 [2023-08-29 22:44:28,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 56 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 323.25) internal successors, (1293), 4 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:28,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:28,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 758 [2023-08-29 22:44:28,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:32,757 INFO L130 PetriNetUnfolder]: 26759/40062 cut-off events. [2023-08-29 22:44:32,757 INFO L131 PetriNetUnfolder]: For 30362/30362 co-relation queries the response was YES. [2023-08-29 22:44:32,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110352 conditions, 40062 events. 26759/40062 cut-off events. For 30362/30362 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 267310 event pairs, 22285 based on Foata normal form. 84/40146 useless extension candidates. Maximal degree in co-relation 110330. Up to 33375 conditions per place. [2023-08-29 22:44:32,960 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 98 selfloop transitions, 3 changer transitions 4/105 dead transitions. [2023-08-29 22:44:32,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 105 transitions, 710 flow [2023-08-29 22:44:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:44:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:44:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1331 transitions. [2023-08-29 22:44:32,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43898416886543534 [2023-08-29 22:44:32,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1331 transitions. [2023-08-29 22:44:32,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1331 transitions. [2023-08-29 22:44:32,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:32,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1331 transitions. [2023-08-29 22:44:32,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:32,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:32,964 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:32,964 INFO L175 Difference]: Start difference. First operand has 84 places, 56 transitions, 292 flow. Second operand 4 states and 1331 transitions. [2023-08-29 22:44:32,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 105 transitions, 710 flow [2023-08-29 22:44:33,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 105 transitions, 677 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:44:33,041 INFO L231 Difference]: Finished difference. Result has 83 places, 57 transitions, 297 flow [2023-08-29 22:44:33,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=83, PETRI_TRANSITIONS=57} [2023-08-29 22:44:33,042 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2023-08-29 22:44:33,042 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 57 transitions, 297 flow [2023-08-29 22:44:33,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 323.25) internal successors, (1293), 4 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:33,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:33,042 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:33,052 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 (39)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:33,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /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 [2023-08-29 22:44:33,242 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:33,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:33,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1337720490, now seen corresponding path program 2 times [2023-08-29 22:44:33,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:33,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179621373] [2023-08-29 22:44:33,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:44:33,243 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 [2023-08-29 22:44:33,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:33,244 INFO L229 MonitoredProcess]: Starting monitored process 40 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) [2023-08-29 22:44:33,244 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 (40)] Waiting until timeout for monitored process [2023-08-29 22:44:33,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:44:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:44:33,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:33,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:44:33,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:33,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179621373] [2023-08-29 22:44:33,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179621373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:44:33,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:44:33,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:44:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195095433] [2023-08-29 22:44:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:44:33,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:44:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:44:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:44:33,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 758 [2023-08-29 22:44:33,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 311.1666666666667) internal successors, (1867), 6 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:33,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:33,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 758 [2023-08-29 22:44:33,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:38,431 INFO L130 PetriNetUnfolder]: 27355/40940 cut-off events. [2023-08-29 22:44:38,432 INFO L131 PetriNetUnfolder]: For 28616/28616 co-relation queries the response was YES. [2023-08-29 22:44:38,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115254 conditions, 40940 events. 27355/40940 cut-off events. For 28616/28616 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 274290 event pairs, 22201 based on Foata normal form. 66/41006 useless extension candidates. Maximal degree in co-relation 115230. Up to 33339 conditions per place. [2023-08-29 22:44:38,679 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 129 selfloop transitions, 10 changer transitions 20/159 dead transitions. [2023-08-29 22:44:38,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 159 transitions, 1072 flow [2023-08-29 22:44:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:44:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:44:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2246 transitions. [2023-08-29 22:44:38,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232943837165473 [2023-08-29 22:44:38,681 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2246 transitions. [2023-08-29 22:44:38,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2246 transitions. [2023-08-29 22:44:38,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:38,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2246 transitions. [2023-08-29 22:44:38,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 320.85714285714283) internal successors, (2246), 7 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:38,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:38,685 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:38,685 INFO L175 Difference]: Start difference. First operand has 83 places, 57 transitions, 297 flow. Second operand 7 states and 2246 transitions. [2023-08-29 22:44:38,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 159 transitions, 1072 flow [2023-08-29 22:44:38,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 159 transitions, 1048 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:44:38,786 INFO L231 Difference]: Finished difference. Result has 92 places, 65 transitions, 373 flow [2023-08-29 22:44:38,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2023-08-29 22:44:38,786 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 27 predicate places. [2023-08-29 22:44:38,787 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 373 flow [2023-08-29 22:44:38,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 311.1666666666667) internal successors, (1867), 6 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:38,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:38,787 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:38,794 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 (40)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:38,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /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 [2023-08-29 22:44:38,989 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:38,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:38,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1772894812, now seen corresponding path program 3 times [2023-08-29 22:44:38,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:38,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733744492] [2023-08-29 22:44:38,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:44:38,990 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 [2023-08-29 22:44:38,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:38,990 INFO L229 MonitoredProcess]: Starting monitored process 41 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) [2023-08-29 22:44:38,992 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 (41)] Waiting until timeout for monitored process [2023-08-29 22:44:39,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 22:44:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:44:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:39,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:44:39,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:39,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733744492] [2023-08-29 22:44:39,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733744492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:44:39,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:44:39,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:44:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862912214] [2023-08-29 22:44:39,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:44:39,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:44:39,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:39,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:44:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:44:39,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 758 [2023-08-29 22:44:39,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 373 flow. Second operand has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:39,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:39,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 758 [2023-08-29 22:44:39,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:44,189 INFO L130 PetriNetUnfolder]: 28250/42147 cut-off events. [2023-08-29 22:44:44,190 INFO L131 PetriNetUnfolder]: For 64819/64819 co-relation queries the response was YES. [2023-08-29 22:44:44,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141569 conditions, 42147 events. 28250/42147 cut-off events. For 64819/64819 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 279814 event pairs, 22372 based on Foata normal form. 438/42585 useless extension candidates. Maximal degree in co-relation 141540. Up to 33874 conditions per place. [2023-08-29 22:44:44,509 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 126 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2023-08-29 22:44:44,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 988 flow [2023-08-29 22:44:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:44:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:44:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1325 transitions. [2023-08-29 22:44:44,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43700527704485487 [2023-08-29 22:44:44,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1325 transitions. [2023-08-29 22:44:44,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1325 transitions. [2023-08-29 22:44:44,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:44,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1325 transitions. [2023-08-29 22:44:44,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.25) internal successors, (1325), 4 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:44,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:44,513 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:44,513 INFO L175 Difference]: Start difference. First operand has 92 places, 65 transitions, 373 flow. Second operand 4 states and 1325 transitions. [2023-08-29 22:44:44,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 988 flow [2023-08-29 22:44:44,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 957 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-29 22:44:44,677 INFO L231 Difference]: Finished difference. Result has 94 places, 68 transitions, 410 flow [2023-08-29 22:44:44,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=410, PETRI_PLACES=94, PETRI_TRANSITIONS=68} [2023-08-29 22:44:44,677 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 29 predicate places. [2023-08-29 22:44:44,677 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 68 transitions, 410 flow [2023-08-29 22:44:44,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:44,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:44,678 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:44,686 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 (41)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:44,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /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 [2023-08-29 22:44:44,886 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:44,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1702911230, now seen corresponding path program 4 times [2023-08-29 22:44:44,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:44,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870957891] [2023-08-29 22:44:44,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:44:44,887 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 [2023-08-29 22:44:44,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:44,888 INFO L229 MonitoredProcess]: Starting monitored process 42 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) [2023-08-29 22:44:44,890 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 (42)] Waiting until timeout for monitored process [2023-08-29 22:44:45,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:44:45,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:44:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:45,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:44:45,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:45,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870957891] [2023-08-29 22:44:45,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870957891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:44:45,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:44:45,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:44:45,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15721859] [2023-08-29 22:44:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:44:45,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:44:45,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:45,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:44:45,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:44:45,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 758 [2023-08-29 22:44:45,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 68 transitions, 410 flow. Second operand has 4 states, 4 states have (on average 322.25) internal successors, (1289), 4 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:45,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:45,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 758 [2023-08-29 22:44:45,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:50,368 INFO L130 PetriNetUnfolder]: 27292/40533 cut-off events. [2023-08-29 22:44:50,368 INFO L131 PetriNetUnfolder]: For 67868/67868 co-relation queries the response was YES. [2023-08-29 22:44:50,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141021 conditions, 40533 events. 27292/40533 cut-off events. For 67868/67868 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 270906 event pairs, 2849 based on Foata normal form. 438/40971 useless extension candidates. Maximal degree in co-relation 140990. Up to 33591 conditions per place. [2023-08-29 22:44:50,605 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 107 selfloop transitions, 8 changer transitions 2/117 dead transitions. [2023-08-29 22:44:50,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 117 transitions, 917 flow [2023-08-29 22:44:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:44:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:44:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1317 transitions. [2023-08-29 22:44:50,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43436675461741425 [2023-08-29 22:44:50,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1317 transitions. [2023-08-29 22:44:50,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1317 transitions. [2023-08-29 22:44:50,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:50,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1317 transitions. [2023-08-29 22:44:50,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:50,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:50,609 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:50,610 INFO L175 Difference]: Start difference. First operand has 94 places, 68 transitions, 410 flow. Second operand 4 states and 1317 transitions. [2023-08-29 22:44:50,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 117 transitions, 917 flow [2023-08-29 22:44:50,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 117 transitions, 904 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 22:44:50,742 INFO L231 Difference]: Finished difference. Result has 98 places, 69 transitions, 440 flow [2023-08-29 22:44:50,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=98, PETRI_TRANSITIONS=69} [2023-08-29 22:44:50,743 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-29 22:44:50,743 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 69 transitions, 440 flow [2023-08-29 22:44:50,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.25) internal successors, (1289), 4 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:50,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:50,743 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:50,754 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 (42)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:50,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /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 [2023-08-29 22:44:50,943 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:50,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:50,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1932985171, now seen corresponding path program 1 times [2023-08-29 22:44:50,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155223282] [2023-08-29 22:44:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:44:50,944 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 [2023-08-29 22:44:50,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:50,945 INFO L229 MonitoredProcess]: Starting monitored process 43 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) [2023-08-29 22:44:50,948 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 (43)] Waiting until timeout for monitored process [2023-08-29 22:44:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:44:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:44:51,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:51,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:44:51,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:51,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155223282] [2023-08-29 22:44:51,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155223282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:44:51,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:44:51,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:44:51,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426822847] [2023-08-29 22:44:51,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:44:51,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:44:51,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:44:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:44:51,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 758 [2023-08-29 22:44:51,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 69 transitions, 440 flow. Second operand has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:51,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:51,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 758 [2023-08-29 22:44:51,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:56,650 INFO L130 PetriNetUnfolder]: 27281/40559 cut-off events. [2023-08-29 22:44:56,650 INFO L131 PetriNetUnfolder]: For 77494/77494 co-relation queries the response was YES. [2023-08-29 22:44:56,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142065 conditions, 40559 events. 27281/40559 cut-off events. For 77494/77494 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 265160 event pairs, 22966 based on Foata normal form. 53/40612 useless extension candidates. Maximal degree in co-relation 142031. Up to 35670 conditions per place. [2023-08-29 22:44:56,973 INFO L137 encePairwiseOnDemand]: 750/758 looper letters, 113 selfloop transitions, 10 changer transitions 4/127 dead transitions. [2023-08-29 22:44:56,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 127 transitions, 1029 flow [2023-08-29 22:44:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:44:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:44:56,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1601 transitions. [2023-08-29 22:44:56,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224274406332454 [2023-08-29 22:44:56,975 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1601 transitions. [2023-08-29 22:44:56,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1601 transitions. [2023-08-29 22:44:56,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:56,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1601 transitions. [2023-08-29 22:44:56,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.2) internal successors, (1601), 5 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:56,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:56,979 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:56,979 INFO L175 Difference]: Start difference. First operand has 98 places, 69 transitions, 440 flow. Second operand 5 states and 1601 transitions. [2023-08-29 22:44:56,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 127 transitions, 1029 flow [2023-08-29 22:44:57,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 127 transitions, 991 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-29 22:44:57,165 INFO L231 Difference]: Finished difference. Result has 98 places, 70 transitions, 453 flow [2023-08-29 22:44:57,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=98, PETRI_TRANSITIONS=70} [2023-08-29 22:44:57,165 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-29 22:44:57,165 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 70 transitions, 453 flow [2023-08-29 22:44:57,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:57,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:57,165 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:57,175 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 (43)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:57,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /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 [2023-08-29 22:44:57,366 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:57,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:57,366 INFO L85 PathProgramCache]: Analyzing trace with hash -774464335, now seen corresponding path program 2 times [2023-08-29 22:44:57,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:57,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895543209] [2023-08-29 22:44:57,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:44:57,367 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 [2023-08-29 22:44:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:57,368 INFO L229 MonitoredProcess]: Starting monitored process 44 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) [2023-08-29 22:44:57,370 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 (44)] Waiting until timeout for monitored process [2023-08-29 22:44:57,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:44:57,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:44:57,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-29 22:44:57,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:44:57,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:57,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895543209] [2023-08-29 22:44:57,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895543209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:44:57,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:44:57,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:44:57,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186414668] [2023-08-29 22:44:57,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:44:57,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:44:57,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:57,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:44:57,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:44:58,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 758 [2023-08-29 22:44:58,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 70 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 311.5) internal successors, (1869), 6 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:58,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:58,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 758 [2023-08-29 22:44:58,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:03,415 INFO L130 PetriNetUnfolder]: 27397/40902 cut-off events. [2023-08-29 22:45:03,416 INFO L131 PetriNetUnfolder]: For 79420/79420 co-relation queries the response was YES. [2023-08-29 22:45:03,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147054 conditions, 40902 events. 27397/40902 cut-off events. For 79420/79420 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 269699 event pairs, 21487 based on Foata normal form. 58/40960 useless extension candidates. Maximal degree in co-relation 147021. Up to 33877 conditions per place. [2023-08-29 22:45:03,732 INFO L137 encePairwiseOnDemand]: 750/758 looper letters, 136 selfloop transitions, 14 changer transitions 22/172 dead transitions. [2023-08-29 22:45:03,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 172 transitions, 1365 flow [2023-08-29 22:45:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:45:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:45:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2246 transitions. [2023-08-29 22:45:03,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232943837165473 [2023-08-29 22:45:03,734 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2246 transitions. [2023-08-29 22:45:03,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2246 transitions. [2023-08-29 22:45:03,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:03,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2246 transitions. [2023-08-29 22:45:03,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 320.85714285714283) internal successors, (2246), 7 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:03,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:03,738 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:03,739 INFO L175 Difference]: Start difference. First operand has 98 places, 70 transitions, 453 flow. Second operand 7 states and 2246 transitions. [2023-08-29 22:45:03,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 172 transitions, 1365 flow [2023-08-29 22:45:03,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1329 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:45:03,880 INFO L231 Difference]: Finished difference. Result has 106 places, 77 transitions, 542 flow [2023-08-29 22:45:03,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=106, PETRI_TRANSITIONS=77} [2023-08-29 22:45:03,881 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-08-29 22:45:03,881 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 77 transitions, 542 flow [2023-08-29 22:45:03,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 311.5) internal successors, (1869), 6 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:03,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:03,881 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:03,892 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 (44)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:04,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /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 [2023-08-29 22:45:04,082 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:04,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1264076813, now seen corresponding path program 3 times [2023-08-29 22:45:04,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:04,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617477062] [2023-08-29 22:45:04,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:45:04,083 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 [2023-08-29 22:45:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:04,083 INFO L229 MonitoredProcess]: Starting monitored process 45 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) [2023-08-29 22:45:04,087 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 (45)] Waiting until timeout for monitored process [2023-08-29 22:45:04,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:45:04,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:04,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:45:04,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:04,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:04,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:04,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617477062] [2023-08-29 22:45:04,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617477062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:45:04,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:45:04,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-29 22:45:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248216682] [2023-08-29 22:45:04,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:45:04,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:45:04,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:04,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:45:04,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:45:04,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:45:04,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 77 transitions, 542 flow. Second operand has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:04,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:04,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:45:04,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:10,305 INFO L130 PetriNetUnfolder]: 27322/40653 cut-off events. [2023-08-29 22:45:10,305 INFO L131 PetriNetUnfolder]: For 139702/139702 co-relation queries the response was YES. [2023-08-29 22:45:10,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162836 conditions, 40653 events. 27322/40653 cut-off events. For 139702/139702 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 270577 event pairs, 7022 based on Foata normal form. 111/40764 useless extension candidates. Maximal degree in co-relation 162798. Up to 11684 conditions per place. [2023-08-29 22:45:10,593 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 219 selfloop transitions, 9 changer transitions 129/357 dead transitions. [2023-08-29 22:45:10,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 357 transitions, 3215 flow [2023-08-29 22:45:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:45:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:45:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2950 transitions. [2023-08-29 22:45:10,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43242450894165935 [2023-08-29 22:45:10,596 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2950 transitions. [2023-08-29 22:45:10,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2950 transitions. [2023-08-29 22:45:10,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:10,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2950 transitions. [2023-08-29 22:45:10,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 327.77777777777777) internal successors, (2950), 9 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:10,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 758.0) internal successors, (7580), 10 states have internal predecessors, (7580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:10,601 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 758.0) internal successors, (7580), 10 states have internal predecessors, (7580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:10,601 INFO L175 Difference]: Start difference. First operand has 106 places, 77 transitions, 542 flow. Second operand 9 states and 2950 transitions. [2023-08-29 22:45:10,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 357 transitions, 3215 flow [2023-08-29 22:45:10,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 357 transitions, 3059 flow, removed 49 selfloop flow, removed 2 redundant places. [2023-08-29 22:45:10,733 INFO L231 Difference]: Finished difference. Result has 117 places, 77 transitions, 558 flow [2023-08-29 22:45:10,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=558, PETRI_PLACES=117, PETRI_TRANSITIONS=77} [2023-08-29 22:45:10,733 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 52 predicate places. [2023-08-29 22:45:10,733 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 77 transitions, 558 flow [2023-08-29 22:45:10,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:10,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:10,734 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:10,742 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 (45)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /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 [2023-08-29 22:45:10,934 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:10,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1942417186, now seen corresponding path program 4 times [2023-08-29 22:45:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183175413] [2023-08-29 22:45:10,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:45:10,935 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 [2023-08-29 22:45:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:10,936 INFO L229 MonitoredProcess]: Starting monitored process 46 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) [2023-08-29 22:45:10,937 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 (46)] Waiting until timeout for monitored process [2023-08-29 22:45:11,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:45:11,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:11,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:45:11,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-29 22:45:11,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:45:11,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183175413] [2023-08-29 22:45:11,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183175413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:45:11,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:45:11,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:45:11,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68663847] [2023-08-29 22:45:11,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:45:11,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:45:11,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:11,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:45:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:45:11,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 758 [2023-08-29 22:45:11,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 77 transitions, 558 flow. Second operand has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:11,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:11,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 758 [2023-08-29 22:45:11,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:15,979 INFO L130 PetriNetUnfolder]: 20541/30240 cut-off events. [2023-08-29 22:45:15,979 INFO L131 PetriNetUnfolder]: For 124686/124686 co-relation queries the response was YES. [2023-08-29 22:45:16,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132425 conditions, 30240 events. 20541/30240 cut-off events. For 124686/124686 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 184754 event pairs, 15877 based on Foata normal form. 42/30282 useless extension candidates. Maximal degree in co-relation 132381. Up to 24581 conditions per place. [2023-08-29 22:45:16,178 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 105 selfloop transitions, 11 changer transitions 19/135 dead transitions. [2023-08-29 22:45:16,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 135 transitions, 1241 flow [2023-08-29 22:45:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:45:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:45:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1604 transitions. [2023-08-29 22:45:16,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42321899736147756 [2023-08-29 22:45:16,180 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1604 transitions. [2023-08-29 22:45:16,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1604 transitions. [2023-08-29 22:45:16,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:16,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1604 transitions. [2023-08-29 22:45:16,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.8) internal successors, (1604), 5 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:16,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:16,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:16,184 INFO L175 Difference]: Start difference. First operand has 117 places, 77 transitions, 558 flow. Second operand 5 states and 1604 transitions. [2023-08-29 22:45:16,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 135 transitions, 1241 flow [2023-08-29 22:45:16,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 135 transitions, 1161 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-29 22:45:16,379 INFO L231 Difference]: Finished difference. Result has 111 places, 74 transitions, 538 flow [2023-08-29 22:45:16,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=538, PETRI_PLACES=111, PETRI_TRANSITIONS=74} [2023-08-29 22:45:16,380 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 46 predicate places. [2023-08-29 22:45:16,380 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 74 transitions, 538 flow [2023-08-29 22:45:16,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:16,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:16,380 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:16,391 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 (46)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:16,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /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 [2023-08-29 22:45:16,580 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:16,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:16,581 INFO L85 PathProgramCache]: Analyzing trace with hash -696483112, now seen corresponding path program 5 times [2023-08-29 22:45:16,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:16,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718956649] [2023-08-29 22:45:16,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 22:45:16,581 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 [2023-08-29 22:45:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:16,582 INFO L229 MonitoredProcess]: Starting monitored process 47 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) [2023-08-29 22:45:16,583 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 (47)] Waiting until timeout for monitored process [2023-08-29 22:45:17,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-29 22:45:17,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:45:17,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-08-29 22:45:17,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-08-29 22:45:17,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718956649] [2023-08-29 22:45:17,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718956649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:45:17,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:45:17,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:45:17,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664005556] [2023-08-29 22:45:17,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:45:17,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:45:17,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:45:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:45:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 758 [2023-08-29 22:45:18,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 74 transitions, 538 flow. Second operand has 10 states, 10 states have (on average 307.7) internal successors, (3077), 10 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:18,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:18,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 758 [2023-08-29 22:45:18,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:22,694 INFO L130 PetriNetUnfolder]: 20351/29930 cut-off events. [2023-08-29 22:45:22,694 INFO L131 PetriNetUnfolder]: For 115247/115247 co-relation queries the response was YES. [2023-08-29 22:45:22,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128097 conditions, 29930 events. 20351/29930 cut-off events. For 115247/115247 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 184813 event pairs, 5815 based on Foata normal form. 38/29968 useless extension candidates. Maximal degree in co-relation 128055. Up to 24983 conditions per place. [2023-08-29 22:45:22,874 INFO L137 encePairwiseOnDemand]: 747/758 looper letters, 159 selfloop transitions, 21 changer transitions 20/200 dead transitions. [2023-08-29 22:45:22,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 200 transitions, 1786 flow [2023-08-29 22:45:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:45:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:45:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3139 transitions. [2023-08-29 22:45:22,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141160949868074 [2023-08-29 22:45:22,877 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3139 transitions. [2023-08-29 22:45:22,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3139 transitions. [2023-08-29 22:45:22,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:22,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3139 transitions. [2023-08-29 22:45:22,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 313.9) internal successors, (3139), 10 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:22,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:22,882 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:22,882 INFO L175 Difference]: Start difference. First operand has 111 places, 74 transitions, 538 flow. Second operand 10 states and 3139 transitions. [2023-08-29 22:45:22,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 200 transitions, 1786 flow [2023-08-29 22:45:23,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1750 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-29 22:45:23,117 INFO L231 Difference]: Finished difference. Result has 117 places, 78 transitions, 627 flow [2023-08-29 22:45:23,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=627, PETRI_PLACES=117, PETRI_TRANSITIONS=78} [2023-08-29 22:45:23,117 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 52 predicate places. [2023-08-29 22:45:23,117 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 78 transitions, 627 flow [2023-08-29 22:45:23,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 307.7) internal successors, (3077), 10 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:23,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:23,118 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:23,131 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 (47)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:23,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /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 [2023-08-29 22:45:23,318 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:23,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1018143039, now seen corresponding path program 1 times [2023-08-29 22:45:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:23,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539239930] [2023-08-29 22:45:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:45:23,319 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 [2023-08-29 22:45:23,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:23,320 INFO L229 MonitoredProcess]: Starting monitored process 48 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) [2023-08-29 22:45:23,320 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 (48)] Waiting until timeout for monitored process [2023-08-29 22:45:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:45:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:45:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-29 22:45:23,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:45:23,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:23,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539239930] [2023-08-29 22:45:23,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539239930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:45:23,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:45:23,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:45:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937495986] [2023-08-29 22:45:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:45:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:45:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:45:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:45:23,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:45:23,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 78 transitions, 627 flow. Second operand has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:23,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:23,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:45:23,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:28,267 INFO L130 PetriNetUnfolder]: 21025/30844 cut-off events. [2023-08-29 22:45:28,267 INFO L131 PetriNetUnfolder]: For 137852/137852 co-relation queries the response was YES. [2023-08-29 22:45:28,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136479 conditions, 30844 events. 21025/30844 cut-off events. For 137852/137852 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 185268 event pairs, 15899 based on Foata normal form. 360/31204 useless extension candidates. Maximal degree in co-relation 136434. Up to 24545 conditions per place. [2023-08-29 22:45:28,501 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 145 selfloop transitions, 16 changer transitions 2/163 dead transitions. [2023-08-29 22:45:28,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 163 transitions, 1534 flow [2023-08-29 22:45:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:45:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:45:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1955 transitions. [2023-08-29 22:45:28,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298592788038698 [2023-08-29 22:45:28,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1955 transitions. [2023-08-29 22:45:28,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1955 transitions. [2023-08-29 22:45:28,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:28,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1955 transitions. [2023-08-29 22:45:28,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 325.8333333333333) internal successors, (1955), 6 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:28,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:28,507 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:28,507 INFO L175 Difference]: Start difference. First operand has 117 places, 78 transitions, 627 flow. Second operand 6 states and 1955 transitions. [2023-08-29 22:45:28,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 163 transitions, 1534 flow [2023-08-29 22:45:29,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 163 transitions, 1472 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-08-29 22:45:29,038 INFO L231 Difference]: Finished difference. Result has 119 places, 83 transitions, 704 flow [2023-08-29 22:45:29,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=704, PETRI_PLACES=119, PETRI_TRANSITIONS=83} [2023-08-29 22:45:29,039 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 54 predicate places. [2023-08-29 22:45:29,039 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 83 transitions, 704 flow [2023-08-29 22:45:29,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:29,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:29,039 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:29,051 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 (48)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:29,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /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 [2023-08-29 22:45:29,241 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:29,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:29,241 INFO L85 PathProgramCache]: Analyzing trace with hash -171053777, now seen corresponding path program 2 times [2023-08-29 22:45:29,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:29,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872756667] [2023-08-29 22:45:29,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:45:29,242 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 [2023-08-29 22:45:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:29,242 INFO L229 MonitoredProcess]: Starting monitored process 49 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) [2023-08-29 22:45:29,243 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 (49)] Waiting until timeout for monitored process [2023-08-29 22:45:29,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:45:29,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:45:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-29 22:45:29,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-29 22:45:30,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:30,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872756667] [2023-08-29 22:45:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872756667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:45:30,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:45:30,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-29 22:45:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41515989] [2023-08-29 22:45:30,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:45:30,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:45:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:45:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:45:30,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:45:30,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 83 transitions, 704 flow. Second operand has 13 states, 13 states have (on average 315.84615384615387) internal successors, (4106), 13 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:30,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:30,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:45:30,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:35,338 INFO L130 PetriNetUnfolder]: 21025/30809 cut-off events. [2023-08-29 22:45:35,338 INFO L131 PetriNetUnfolder]: For 128059/128059 co-relation queries the response was YES. [2023-08-29 22:45:35,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132222 conditions, 30809 events. 21025/30809 cut-off events. For 128059/128059 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 189687 event pairs, 3430 based on Foata normal form. 35/30844 useless extension candidates. Maximal degree in co-relation 132175. Up to 6564 conditions per place. [2023-08-29 22:45:35,561 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 283 selfloop transitions, 8 changer transitions 47/338 dead transitions. [2023-08-29 22:45:35,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 338 transitions, 3689 flow [2023-08-29 22:45:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:45:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:45:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2613 transitions. [2023-08-29 22:45:35,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43090369393139843 [2023-08-29 22:45:35,563 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2613 transitions. [2023-08-29 22:45:35,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2613 transitions. [2023-08-29 22:45:35,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:35,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2613 transitions. [2023-08-29 22:45:35,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 326.625) internal successors, (2613), 8 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:35,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:35,567 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:35,567 INFO L175 Difference]: Start difference. First operand has 119 places, 83 transitions, 704 flow. Second operand 8 states and 2613 transitions. [2023-08-29 22:45:35,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 338 transitions, 3689 flow [2023-08-29 22:45:35,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 338 transitions, 3577 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-29 22:45:35,913 INFO L231 Difference]: Finished difference. Result has 127 places, 83 transitions, 710 flow [2023-08-29 22:45:35,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=710, PETRI_PLACES=127, PETRI_TRANSITIONS=83} [2023-08-29 22:45:35,913 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 62 predicate places. [2023-08-29 22:45:35,913 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 83 transitions, 710 flow [2023-08-29 22:45:35,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 315.84615384615387) internal successors, (4106), 13 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:35,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:35,914 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:35,926 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 (49)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:36,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /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 [2023-08-29 22:45:36,114 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:36,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash 967447606, now seen corresponding path program 3 times [2023-08-29 22:45:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:36,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877290778] [2023-08-29 22:45:36,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:45:36,115 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 [2023-08-29 22:45:36,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:36,116 INFO L229 MonitoredProcess]: Starting monitored process 50 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) [2023-08-29 22:45:36,116 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 (50)] Waiting until timeout for monitored process [2023-08-29 22:45:36,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 22:45:36,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:45:36,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-08-29 22:45:36,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:45:36,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:36,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877290778] [2023-08-29 22:45:36,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877290778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:45:36,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:45:36,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:45:36,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197537113] [2023-08-29 22:45:36,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:45:36,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:45:36,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:36,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:45:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:45:36,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:45:36,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 83 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:36,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:36,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:45:36,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:41,258 INFO L130 PetriNetUnfolder]: 20646/30205 cut-off events. [2023-08-29 22:45:41,258 INFO L131 PetriNetUnfolder]: For 138259/138259 co-relation queries the response was YES. [2023-08-29 22:45:41,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133594 conditions, 30205 events. 20646/30205 cut-off events. For 138259/138259 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 180923 event pairs, 14159 based on Foata normal form. 320/30525 useless extension candidates. Maximal degree in co-relation 133545. Up to 23547 conditions per place. [2023-08-29 22:45:41,468 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 146 selfloop transitions, 19 changer transitions 1/166 dead transitions. [2023-08-29 22:45:41,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 166 transitions, 1634 flow [2023-08-29 22:45:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:45:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:45:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1958 transitions. [2023-08-29 22:45:41,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43051890941073 [2023-08-29 22:45:41,470 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1958 transitions. [2023-08-29 22:45:41,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1958 transitions. [2023-08-29 22:45:41,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:41,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1958 transitions. [2023-08-29 22:45:41,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 326.3333333333333) internal successors, (1958), 6 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:41,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:41,473 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:41,473 INFO L175 Difference]: Start difference. First operand has 127 places, 83 transitions, 710 flow. Second operand 6 states and 1958 transitions. [2023-08-29 22:45:41,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 166 transitions, 1634 flow [2023-08-29 22:45:41,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 166 transitions, 1556 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-29 22:45:41,867 INFO L231 Difference]: Finished difference. Result has 126 places, 86 transitions, 767 flow [2023-08-29 22:45:41,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=767, PETRI_PLACES=126, PETRI_TRANSITIONS=86} [2023-08-29 22:45:41,867 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 61 predicate places. [2023-08-29 22:45:41,867 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 86 transitions, 767 flow [2023-08-29 22:45:41,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:41,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:41,868 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:41,878 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 (50)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:42,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /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 [2023-08-29 22:45:42,069 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:42,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:42,069 INFO L85 PathProgramCache]: Analyzing trace with hash -870686778, now seen corresponding path program 4 times [2023-08-29 22:45:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:42,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298266503] [2023-08-29 22:45:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:45:42,070 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 [2023-08-29 22:45:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:42,071 INFO L229 MonitoredProcess]: Starting monitored process 51 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) [2023-08-29 22:45:42,073 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 (51)] Waiting until timeout for monitored process [2023-08-29 22:45:42,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:45:42,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:45:42,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-08-29 22:45:42,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-08-29 22:45:42,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:42,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298266503] [2023-08-29 22:45:42,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298266503] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:45:42,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:45:42,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-08-29 22:45:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601961328] [2023-08-29 22:45:42,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:45:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:45:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:45:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:45:42,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:45:42,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 86 transitions, 767 flow. Second operand has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:42,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:42,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:45:42,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:47,067 INFO L130 PetriNetUnfolder]: 19890/29099 cut-off events. [2023-08-29 22:45:47,067 INFO L131 PetriNetUnfolder]: For 130341/130341 co-relation queries the response was YES. [2023-08-29 22:45:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127483 conditions, 29099 events. 19890/29099 cut-off events. For 130341/130341 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 175008 event pairs, 1204 based on Foata normal form. 320/29419 useless extension candidates. Maximal degree in co-relation 127433. Up to 14618 conditions per place. [2023-08-29 22:45:47,257 INFO L137 encePairwiseOnDemand]: 750/758 looper letters, 137 selfloop transitions, 49 changer transitions 3/189 dead transitions. [2023-08-29 22:45:47,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 189 transitions, 1853 flow [2023-08-29 22:45:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:45:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:45:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2274 transitions. [2023-08-29 22:45:47,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-29 22:45:47,259 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2274 transitions. [2023-08-29 22:45:47,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2274 transitions. [2023-08-29 22:45:47,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:47,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2274 transitions. [2023-08-29 22:45:47,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 324.85714285714283) internal successors, (2274), 7 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:47,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:47,262 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:47,263 INFO L175 Difference]: Start difference. First operand has 126 places, 86 transitions, 767 flow. Second operand 7 states and 2274 transitions. [2023-08-29 22:45:47,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 189 transitions, 1853 flow [2023-08-29 22:45:47,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 189 transitions, 1819 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:45:47,759 INFO L231 Difference]: Finished difference. Result has 130 places, 103 transitions, 985 flow [2023-08-29 22:45:47,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=985, PETRI_PLACES=130, PETRI_TRANSITIONS=103} [2023-08-29 22:45:47,760 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 65 predicate places. [2023-08-29 22:45:47,760 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 103 transitions, 985 flow [2023-08-29 22:45:47,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:47,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:47,761 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:47,772 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 (51)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:47,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /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 [2023-08-29 22:45:47,968 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:47,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash 335601190, now seen corresponding path program 5 times [2023-08-29 22:45:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:47,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135327522] [2023-08-29 22:45:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 22:45:47,969 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 [2023-08-29 22:45:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:47,969 INFO L229 MonitoredProcess]: Starting monitored process 52 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) [2023-08-29 22:45:47,971 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 (52)] Waiting until timeout for monitored process [2023-08-29 22:45:48,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-29 22:45:48,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:45:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-08-29 22:45:48,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:45:48,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:48,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135327522] [2023-08-29 22:45:48,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135327522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:45:48,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:45:48,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:45:48,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024344112] [2023-08-29 22:45:48,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:45:48,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:45:48,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:48,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:45:48,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:45:48,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 758 [2023-08-29 22:45:48,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 103 transitions, 985 flow. Second operand has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:48,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:48,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 758 [2023-08-29 22:45:48,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:53,030 INFO L130 PetriNetUnfolder]: 19331/28134 cut-off events. [2023-08-29 22:45:53,030 INFO L131 PetriNetUnfolder]: For 138666/138666 co-relation queries the response was YES. [2023-08-29 22:45:53,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128642 conditions, 28134 events. 19331/28134 cut-off events. For 138666/138666 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 163310 event pairs, 11918 based on Foata normal form. 34/28168 useless extension candidates. Maximal degree in co-relation 128591. Up to 24156 conditions per place. [2023-08-29 22:45:53,246 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 115 selfloop transitions, 19 changer transitions 17/151 dead transitions. [2023-08-29 22:45:53,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 151 transitions, 1593 flow [2023-08-29 22:45:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:45:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:45:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1634 transitions. [2023-08-29 22:45:53,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43113456464379946 [2023-08-29 22:45:53,248 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1634 transitions. [2023-08-29 22:45:53,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1634 transitions. [2023-08-29 22:45:53,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:53,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1634 transitions. [2023-08-29 22:45:53,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 326.8) internal successors, (1634), 5 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:53,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:53,250 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:53,250 INFO L175 Difference]: Start difference. First operand has 130 places, 103 transitions, 985 flow. Second operand 5 states and 1634 transitions. [2023-08-29 22:45:53,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 151 transitions, 1593 flow [2023-08-29 22:45:53,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 151 transitions, 1495 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-29 22:45:53,765 INFO L231 Difference]: Finished difference. Result has 127 places, 101 transitions, 901 flow [2023-08-29 22:45:53,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=901, PETRI_PLACES=127, PETRI_TRANSITIONS=101} [2023-08-29 22:45:53,765 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 62 predicate places. [2023-08-29 22:45:53,766 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 101 transitions, 901 flow [2023-08-29 22:45:53,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:53,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:53,766 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:53,778 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 (52)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:53,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /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 [2023-08-29 22:45:53,966 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:53,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1301690820, now seen corresponding path program 1 times [2023-08-29 22:45:53,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:53,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820190504] [2023-08-29 22:45:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:45:53,967 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 [2023-08-29 22:45:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:53,968 INFO L229 MonitoredProcess]: Starting monitored process 53 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) [2023-08-29 22:45:53,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2023-08-29 22:45:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:45:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:45:54,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-29 22:45:54,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-29 22:45:54,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:54,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820190504] [2023-08-29 22:45:54,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820190504] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:45:54,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:45:54,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-08-29 22:45:54,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417809088] [2023-08-29 22:45:54,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:45:54,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:45:54,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:45:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:45:54,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:45:54,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 101 transitions, 901 flow. Second operand has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:54,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:54,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:45:54,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:58,991 INFO L130 PetriNetUnfolder]: 20419/29678 cut-off events. [2023-08-29 22:45:58,991 INFO L131 PetriNetUnfolder]: For 108385/108385 co-relation queries the response was YES. [2023-08-29 22:45:59,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128446 conditions, 29678 events. 20419/29678 cut-off events. For 108385/108385 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 175569 event pairs, 2892 based on Foata normal form. 490/30168 useless extension candidates. Maximal degree in co-relation 128401. Up to 24009 conditions per place. [2023-08-29 22:45:59,187 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 154 selfloop transitions, 20 changer transitions 3/177 dead transitions. [2023-08-29 22:45:59,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 177 transitions, 1783 flow [2023-08-29 22:45:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:45:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:45:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-08-29 22:45:59,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298153034300792 [2023-08-29 22:45:59,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-08-29 22:45:59,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-08-29 22:45:59,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:59,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-08-29 22:45:59,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.8) internal successors, (1629), 5 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:59,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:59,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:59,192 INFO L175 Difference]: Start difference. First operand has 127 places, 101 transitions, 901 flow. Second operand 5 states and 1629 transitions. [2023-08-29 22:45:59,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 177 transitions, 1783 flow [2023-08-29 22:45:59,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 177 transitions, 1697 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-29 22:45:59,568 INFO L231 Difference]: Finished difference. Result has 124 places, 105 transitions, 935 flow [2023-08-29 22:45:59,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=935, PETRI_PLACES=124, PETRI_TRANSITIONS=105} [2023-08-29 22:45:59,568 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 59 predicate places. [2023-08-29 22:45:59,568 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 105 transitions, 935 flow [2023-08-29 22:45:59,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:59,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:59,569 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:59,580 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 (53)] Ended with exit code 0 [2023-08-29 22:45:59,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /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 [2023-08-29 22:45:59,769 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:59,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1490356124, now seen corresponding path program 2 times [2023-08-29 22:45:59,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:59,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931231225] [2023-08-29 22:45:59,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:45:59,770 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 [2023-08-29 22:45:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:59,771 INFO L229 MonitoredProcess]: Starting monitored process 54 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) [2023-08-29 22:45:59,771 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 (54)] Waiting until timeout for monitored process [2023-08-29 22:46:00,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:46:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:46:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:46:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-08-29 22:46:00,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:46:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-08-29 22:46:00,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:00,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931231225] [2023-08-29 22:46:00,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931231225] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:46:00,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:46:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-08-29 22:46:00,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424758698] [2023-08-29 22:46:00,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:00,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:46:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:00,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:46:00,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:46:00,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:46:00,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 105 transitions, 935 flow. Second operand has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:00,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:00,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:46:00,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:05,134 INFO L130 PetriNetUnfolder]: 21398/31083 cut-off events. [2023-08-29 22:46:05,134 INFO L131 PetriNetUnfolder]: For 123626/123626 co-relation queries the response was YES. [2023-08-29 22:46:05,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138313 conditions, 31083 events. 21398/31083 cut-off events. For 123626/123626 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 183901 event pairs, 11810 based on Foata normal form. 490/31573 useless extension candidates. Maximal degree in co-relation 138266. Up to 23954 conditions per place. [2023-08-29 22:46:05,344 INFO L137 encePairwiseOnDemand]: 750/758 looper letters, 157 selfloop transitions, 22 changer transitions 1/180 dead transitions. [2023-08-29 22:46:05,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 180 transitions, 1815 flow [2023-08-29 22:46:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:46:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:46:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1951 transitions. [2023-08-29 22:46:05,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289797713280563 [2023-08-29 22:46:05,346 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1951 transitions. [2023-08-29 22:46:05,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1951 transitions. [2023-08-29 22:46:05,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:05,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1951 transitions. [2023-08-29 22:46:05,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 325.1666666666667) internal successors, (1951), 6 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:05,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:05,349 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:05,349 INFO L175 Difference]: Start difference. First operand has 124 places, 105 transitions, 935 flow. Second operand 6 states and 1951 transitions. [2023-08-29 22:46:05,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 180 transitions, 1815 flow [2023-08-29 22:46:05,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 180 transitions, 1804 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 22:46:05,658 INFO L231 Difference]: Finished difference. Result has 129 places, 106 transitions, 986 flow [2023-08-29 22:46:05,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=986, PETRI_PLACES=129, PETRI_TRANSITIONS=106} [2023-08-29 22:46:05,658 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 64 predicate places. [2023-08-29 22:46:05,658 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 106 transitions, 986 flow [2023-08-29 22:46:05,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:05,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:05,658 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:05,670 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 (54)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:05,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /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 [2023-08-29 22:46:05,859 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:05,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:05,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1314474816, now seen corresponding path program 3 times [2023-08-29 22:46:05,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:05,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977844784] [2023-08-29 22:46:05,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:46:05,860 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 [2023-08-29 22:46:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:05,860 INFO L229 MonitoredProcess]: Starting monitored process 55 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) [2023-08-29 22:46:05,861 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 (55)] Waiting until timeout for monitored process [2023-08-29 22:46:07,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-29 22:46:07,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:46:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:46:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:46:07,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:46:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:46:07,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977844784] [2023-08-29 22:46:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977844784] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:46:07,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:46:07,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-08-29 22:46:07,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476277405] [2023-08-29 22:46:07,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:46:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:46:07,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:46:07,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-08-29 22:46:07,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 106 transitions, 986 flow. Second operand has 5 states, 5 states have (on average 318.2) internal successors, (1591), 5 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:07,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:07,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-08-29 22:46:07,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:12,155 INFO L130 PetriNetUnfolder]: 20220/29373 cut-off events. [2023-08-29 22:46:12,155 INFO L131 PetriNetUnfolder]: For 121268/121268 co-relation queries the response was YES. [2023-08-29 22:46:12,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132297 conditions, 29373 events. 20220/29373 cut-off events. For 121268/121268 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 171340 event pairs, 11592 based on Foata normal form. 490/29863 useless extension candidates. Maximal degree in co-relation 132248. Up to 25104 conditions per place. [2023-08-29 22:46:12,348 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 134 selfloop transitions, 24 changer transitions 2/160 dead transitions. [2023-08-29 22:46:12,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 160 transitions, 1675 flow [2023-08-29 22:46:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:46:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:46:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-08-29 22:46:12,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298153034300792 [2023-08-29 22:46:12,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-08-29 22:46:12,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-08-29 22:46:12,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:12,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-08-29 22:46:12,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.8) internal successors, (1629), 5 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:12,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:12,352 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:12,352 INFO L175 Difference]: Start difference. First operand has 129 places, 106 transitions, 986 flow. Second operand 5 states and 1629 transitions. [2023-08-29 22:46:12,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 160 transitions, 1675 flow [2023-08-29 22:46:12,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 160 transitions, 1622 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-29 22:46:12,744 INFO L231 Difference]: Finished difference. Result has 128 places, 104 transitions, 964 flow [2023-08-29 22:46:12,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=964, PETRI_PLACES=128, PETRI_TRANSITIONS=104} [2023-08-29 22:46:12,744 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 63 predicate places. [2023-08-29 22:46:12,745 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 104 transitions, 964 flow [2023-08-29 22:46:12,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.2) internal successors, (1591), 5 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:12,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:12,745 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:12,760 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 (55)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:12,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /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 [2023-08-29 22:46:12,945 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:12,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1720882315, now seen corresponding path program 1 times [2023-08-29 22:46:12,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:12,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255729353] [2023-08-29 22:46:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:46:12,946 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 [2023-08-29 22:46:12,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:12,947 INFO L229 MonitoredProcess]: Starting monitored process 56 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) [2023-08-29 22:46:12,948 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 (56)] Waiting until timeout for monitored process [2023-08-29 22:46:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:46:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-29 22:46:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:13,895 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 930 treesize of output 898 [2023-08-29 22:46:14,238 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 [2023-08-29 22:46:14,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:46:14,611 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 22:46:14,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 145 [2023-08-29 22:46:16,008 INFO L321 Elim1Store]: treesize reduction 88, result has 9.3 percent of original size [2023-08-29 22:46:16,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 54 case distinctions, treesize of input 308 treesize of output 124 [2023-08-29 22:46:31,984 WARN L222 SmtUtils]: Spent 15.51s on a formula simplification. DAG size of input: 76 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:46:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-29 22:46:37,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:09,387 WARN L222 SmtUtils]: Spent 14.04s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:51:02,624 WARN L222 SmtUtils]: Spent 3.66m on a formula simplification. DAG size of input: 1268 DAG size of output: 1187 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-29 22:51:02,628 INFO L321 Elim1Store]: treesize reduction 264, result has 94.8 percent of original size [2023-08-29 22:51:02,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 32 select indices, 32 select index equivalence classes, 0 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 496 case distinctions, treesize of input 36302 treesize of output 34436 [2023-08-29 22:51:07,096 INFO L217 Elim1Store]: Index analysis took 696 ms [2023-08-29 22:51:12,836 WARN L222 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 193 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-29 22:51:12,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:51:12,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 13439 treesize of output 12776 [2023-08-29 22:51:14,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:14,761 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:14,823 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,006 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,166 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,219 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,372 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,386 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,786 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,863 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,928 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,929 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:15,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:16,233 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:16,391 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:51:16,434 INFO L217 Elim1Store]: Index analysis took 1877 ms [2023-08-29 22:51:34,830 WARN L222 SmtUtils]: Spent 18.38s on a formula simplification that was a NOOP. DAG size: 506 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-29 22:51:34,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:51:34,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 20 select indices, 20 select index equivalence classes, 54 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 136 case distinctions, treesize of input 12534 treesize of output 12022 [2023-08-29 22:51:38,305 INFO L217 Elim1Store]: Index analysis took 888 ms [2023-08-29 22:51:44,505 WARN L222 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 193 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-29 22:51:44,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:51:44,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 10387 treesize of output 9920 [2023-08-29 22:51:48,302 INFO L217 Elim1Store]: Index analysis took 854 ms [2023-08-29 22:51:54,190 WARN L222 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 193 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-29 22:51:54,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:51:54,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 9463 treesize of output 9024 [2023-08-29 22:51:58,495 INFO L217 Elim1Store]: Index analysis took 1032 ms Killed by 15