./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:31:50,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:31:50,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:31:50,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:31:50,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:31:50,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:31:50,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:31:50,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:31:50,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:31:50,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:31:50,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:31:50,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:31:50,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:31:50,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:31:50,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:31:50,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:31:50,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:31:50,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:31:50,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:31:50,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:31:50,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:31:50,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:31:50,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:31:50,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:31:50,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:31:50,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:31:50,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:31:50,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:31:50,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:31:50,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:31:50,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:31:50,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:31:50,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:31:50,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:31:50,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:31:50,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:31:50,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:31:50,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:31:50,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:31:50,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:31:50,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:31:50,322 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:31:50,346 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:31:50,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:31:50,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:31:50,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:31:50,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:31:50,348 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:31:50,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:31:50,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:31:50,349 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:31:50,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:31:50,350 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:31:50,350 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:31:50,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:31:50,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:31:50,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:31:50,351 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:31:50,351 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:31:50,351 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:31:50,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:31:50,351 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:31:50,351 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:31:50,351 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:31:50,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:31:50,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:31:50,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:31:50,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:31:50,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:31:50,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:31:50,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:31:50,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:31:50,353 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:31:50,353 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:31:50,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:31:50,353 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:31:50,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:31:50,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:31:50,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:31:50,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:31:50,617 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:31:50,618 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:31:50,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-09-01 01:31:51,675 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:31:51,865 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:31:51,865 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-09-01 01:31:51,872 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bd408617/ec039dcf4cc241d88cf3b229733dc379/FLAG52e9ad564 [2023-09-01 01:31:51,882 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bd408617/ec039dcf4cc241d88cf3b229733dc379 [2023-09-01 01:31:51,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:31:51,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:31:51,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:31:51,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:31:51,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:31:51,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:31:51" (1/1) ... [2023-09-01 01:31:51,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a3616ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:51, skipping insertion in model container [2023-09-01 01:31:51,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:31:51" (1/1) ... [2023-09-01 01:31:51,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:31:51,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:31:52,023 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-trans.wvr.c[3034,3047] [2023-09-01 01:31:52,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:31:52,038 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 01:31:52,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1eb8b8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:52, skipping insertion in model container [2023-09-01 01:31:52,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:31:52,039 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:31:52,040 INFO L158 Benchmark]: Toolchain (without parser) took 154.89ms. Allocated memory is still 96.5MB. Free memory was 74.9MB in the beginning and 64.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:31:52,041 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 60.8MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:31:52,041 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.43ms. Allocated memory is still 96.5MB. Free memory was 74.6MB in the beginning and 64.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:31:52,042 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 60.8MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 153.43ms. Allocated memory is still 96.5MB. Free memory was 74.6MB in the beginning and 64.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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-trans.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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:31:53,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:31:53,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:31:53,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:31:53,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:31:53,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:31:53,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:31:53,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:31:53,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:31:53,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:31:53,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:31:53,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:31:53,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:31:53,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:31:53,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:31:53,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:31:53,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:31:53,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:31:53,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:31:53,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:31:53,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:31:53,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:31:53,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:31:53,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:31:53,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:31:53,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:31:53,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:31:53,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:31:53,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:31:53,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:31:53,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:31:53,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:31:53,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:31:53,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:31:53,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:31:53,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:31:53,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:31:53,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:31:53,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:31:53,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:31:53,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:31:53,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:31:53,634 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:31:53,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:31:53,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:31:53,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:31:53,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:31:53,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:31:53,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:31:53,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:31:53,637 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:31:53,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:31:53,638 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:31:53,638 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:31:53,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:31:53,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:31:53,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:31:53,638 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:31:53,639 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:31:53,639 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:31:53,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:31:53,639 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:31:53,639 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:31:53,639 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:31:53,639 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:31:53,639 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:31:53,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:31:53,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:31:53,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:31:53,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:31:53,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:31:53,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:31:53,641 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:31:53,641 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:31:53,641 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:31:53,641 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:31:53,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:31:53,641 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:31:53,641 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:31:53,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:31:53,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:31:53,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:31:53,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:31:53,894 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:31:53,894 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:31:53,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-09-01 01:31:54,843 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:31:55,048 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:31:55,049 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-09-01 01:31:55,086 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702a7fd96/24b7141258794ce79665f4cd48f77767/FLAGdc4f65c47 [2023-09-01 01:31:55,103 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702a7fd96/24b7141258794ce79665f4cd48f77767 [2023-09-01 01:31:55,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:31:55,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:31:55,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:31:55,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:31:55,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:31:55,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68f02cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55, skipping insertion in model container [2023-09-01 01:31:55,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:31:55,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:31:55,291 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-trans.wvr.c[3034,3047] [2023-09-01 01:31:55,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:31:55,323 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:31:55,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:31:55,343 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-trans.wvr.c[3034,3047] [2023-09-01 01:31:55,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:31:55,359 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:31:55,372 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-trans.wvr.c[3034,3047] [2023-09-01 01:31:55,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:31:55,389 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:31:55,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55 WrapperNode [2023-09-01 01:31:55,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:31:55,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:31:55,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:31:55,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:31:55,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,428 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 271 [2023-09-01 01:31:55,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:31:55,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:31:55,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:31:55,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:31:55,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:31:55,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:31:55,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:31:55,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:31:55,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (1/1) ... [2023-09-01 01:31:55,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:31:55,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:31:55,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 01:31:55,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 01:31:55,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:31:55,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:31:55,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:31:55,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:31:55,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:31:55,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:31:55,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:31:55,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:31:55,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:31:55,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:31:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:31:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:31:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:31:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:31:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:31:55,524 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:31:55,632 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:31:55,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:31:56,225 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:31:56,231 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:31:56,235 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:31:56,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:31:56 BoogieIcfgContainer [2023-09-01 01:31:56,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:31:56,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:31:56,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:31:56,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:31:56,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:31:55" (1/3) ... [2023-09-01 01:31:56,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db1ee77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:31:56, skipping insertion in model container [2023-09-01 01:31:56,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:31:55" (2/3) ... [2023-09-01 01:31:56,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db1ee77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:31:56, skipping insertion in model container [2023-09-01 01:31:56,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:31:56" (3/3) ... [2023-09-01 01:31:56,243 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-09-01 01:31:56,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:31:56,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-09-01 01:31:56,254 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:31:56,360 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:31:56,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 346 transitions, 716 flow [2023-09-01 01:31:56,485 INFO L130 PetriNetUnfolder]: 28/343 cut-off events. [2023-09-01 01:31:56,485 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:31:56,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 343 events. 28/343 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 662 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-09-01 01:31:56,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 346 transitions, 716 flow [2023-09-01 01:31:56,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 339 transitions, 696 flow [2023-09-01 01:31:56,502 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:31:56,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 339 transitions, 696 flow [2023-09-01 01:31:56,513 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 339 transitions, 696 flow [2023-09-01 01:31:56,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 339 transitions, 696 flow [2023-09-01 01:31:56,559 INFO L130 PetriNetUnfolder]: 28/339 cut-off events. [2023-09-01 01:31:56,560 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:31:56,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 339 events. 28/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 663 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-09-01 01:31:56,570 INFO L119 LiptonReduction]: Number of co-enabled transitions 19008 [2023-09-01 01:32:18,200 INFO L134 LiptonReduction]: Checked pairs total: 20431 [2023-09-01 01:32:18,200 INFO L136 LiptonReduction]: Total number of compositions: 398 [2023-09-01 01:32:18,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:32:18,214 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;@52941d44, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:32:18,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-09-01 01:32:18,216 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:32:18,216 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:32:18,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:18,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:32:18,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:18,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash 44154, now seen corresponding path program 1 times [2023-09-01 01:32:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:18,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131005568] [2023-09-01 01:32:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:18,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:18,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:18,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:18,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 01:32:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:32:18,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:18,443 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:32:18,443 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 [2023-09-01 01:32:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:32:18,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:18,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:18,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131005568] [2023-09-01 01:32:18,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131005568] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:18,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:18,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:32:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144975960] [2023-09-01 01:32:18,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:18,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:32:18,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:32:18,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:32:18,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-09-01 01:32:18,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:18,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:18,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-09-01 01:32:18,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:20,346 INFO L130 PetriNetUnfolder]: 11903/16592 cut-off events. [2023-09-01 01:32:20,346 INFO L131 PetriNetUnfolder]: For 444/444 co-relation queries the response was YES. [2023-09-01 01:32:20,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33609 conditions, 16592 events. 11903/16592 cut-off events. For 444/444 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 91362 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. [2023-09-01 01:32:20,437 INFO L137 encePairwiseOnDemand]: 733/744 looper letters, 110 selfloop transitions, 6 changer transitions 0/116 dead transitions. [2023-09-01 01:32:20,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 500 flow [2023-09-01 01:32:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:32:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:32:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-09-01 01:32:20,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2023-09-01 01:32:20,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-09-01 01:32:20,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-09-01 01:32:20,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:20,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-09-01 01:32:20,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:20,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:20,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:20,464 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 142 flow. Second operand 3 states and 1020 transitions. [2023-09-01 01:32:20,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 500 flow [2023-09-01 01:32:20,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 116 transitions, 476 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:32:20,470 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 176 flow [2023-09-01 01:32:20,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, 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} [2023-09-01 01:32:20,473 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-09-01 01:32:20,474 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 176 flow [2023-09-01 01:32:20,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:20,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:20,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:32:20,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:20,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:20,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:20,685 INFO L85 PathProgramCache]: Analyzing trace with hash 44153, now seen corresponding path program 1 times [2023-09-01 01:32:20,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:20,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407070309] [2023-09-01 01:32:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:20,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:20,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:20,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 01:32:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:20,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:32:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:20,803 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:32:20,804 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:32:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:32:20,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:20,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:20,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407070309] [2023-09-01 01:32:20,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407070309] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:20,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:20,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:32:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646143373] [2023-09-01 01:32:20,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:32:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:32:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:32:20,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 744 [2023-09-01 01:32:20,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:20,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:20,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 744 [2023-09-01 01:32:20,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:22,205 INFO L130 PetriNetUnfolder]: 11903/16586 cut-off events. [2023-09-01 01:32:22,205 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-09-01 01:32:22,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33342 conditions, 16586 events. 11903/16586 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92068 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. [2023-09-01 01:32:22,258 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-09-01 01:32:22,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 294 flow [2023-09-01 01:32:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:32:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:32:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 966 transitions. [2023-09-01 01:32:22,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327956989247312 [2023-09-01 01:32:22,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 966 transitions. [2023-09-01 01:32:22,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 966 transitions. [2023-09-01 01:32:22,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:22,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 966 transitions. [2023-09-01 01:32:22,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,268 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 176 flow. Second operand 3 states and 966 transitions. [2023-09-01 01:32:22,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 294 flow [2023-09-01 01:32:22,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:32:22,270 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 160 flow [2023-09-01 01:32:22,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, 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} [2023-09-01 01:32:22,271 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-09-01 01:32:22,272 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 160 flow [2023-09-01 01:32:22,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:22,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:32:22,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:22,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:22,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:22,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:22,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1373062, now seen corresponding path program 1 times [2023-09-01 01:32:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:22,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610230742] [2023-09-01 01:32:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:22,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:22,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:22,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:22,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 01:32:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:22,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:32:22,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:22,688 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:32:22,688 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 [2023-09-01 01:32:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:32:22,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:32:22,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:22,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610230742] [2023-09-01 01:32:22,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610230742] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:22,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:22,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:32:22,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027999111] [2023-09-01 01:32:22,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:22,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:32:22,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:22,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:32:22,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:32:23,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-09-01 01:32:23,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:23,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:23,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-09-01 01:32:23,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:28,729 INFO L130 PetriNetUnfolder]: 29756/41459 cut-off events. [2023-09-01 01:32:28,730 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-09-01 01:32:28,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83317 conditions, 41459 events. 29756/41459 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 2429. Compared 256414 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. [2023-09-01 01:32:28,881 INFO L137 encePairwiseOnDemand]: 735/744 looper letters, 248 selfloop transitions, 21 changer transitions 0/269 dead transitions. [2023-09-01 01:32:28,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 269 transitions, 1166 flow [2023-09-01 01:32:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:32:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:32:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2036 transitions. [2023-09-01 01:32:28,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560931899641577 [2023-09-01 01:32:28,886 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2036 transitions. [2023-09-01 01:32:28,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2036 transitions. [2023-09-01 01:32:28,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:28,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2036 transitions. [2023-09-01 01:32:28,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 339.3333333333333) internal successors, (2036), 6 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:28,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:28,898 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:28,898 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 160 flow. Second operand 6 states and 2036 transitions. [2023-09-01 01:32:28,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 269 transitions, 1166 flow [2023-09-01 01:32:28,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 269 transitions, 1165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:32:28,903 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 309 flow [2023-09-01 01:32:28,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, 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} [2023-09-01 01:32:28,906 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-09-01 01:32:28,906 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 309 flow [2023-09-01 01:32:28,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:28,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:28,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:32:28,915 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 [2023-09-01 01:32:29,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:29,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:29,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:29,117 INFO L85 PathProgramCache]: Analyzing trace with hash 42612021, now seen corresponding path program 1 times [2023-09-01 01:32:29,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:29,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21000847] [2023-09-01 01:32:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:29,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:29,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:29,125 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 (5)] Waiting until timeout for monitored process [2023-09-01 01:32:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:29,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:32:29,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:32:29,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:29,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:29,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21000847] [2023-09-01 01:32:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21000847] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:29,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:32:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715635232] [2023-09-01 01:32:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:29,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:32:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:32:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:32:29,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-09-01 01:32:29,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:29,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:29,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-09-01 01:32:29,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:31,297 INFO L130 PetriNetUnfolder]: 23805/33171 cut-off events. [2023-09-01 01:32:31,297 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2023-09-01 01:32:31,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 33171 events. 23805/33171 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 200889 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. [2023-09-01 01:32:31,410 INFO L137 encePairwiseOnDemand]: 735/744 looper letters, 63 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-09-01 01:32:31,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 451 flow [2023-09-01 01:32:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:32:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:32:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-09-01 01:32:31,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390681003584229 [2023-09-01 01:32:31,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-09-01 01:32:31,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-09-01 01:32:31,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:31,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-09-01 01:32:31,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:31,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:31,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:31,419 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 309 flow. Second operand 3 states and 980 transitions. [2023-09-01 01:32:31,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 451 flow [2023-09-01 01:32:31,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 421 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 01:32:31,421 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 313 flow [2023-09-01 01:32:31,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, 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} [2023-09-01 01:32:31,422 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-09-01 01:32:31,422 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 313 flow [2023-09-01 01:32:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:31,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:31,423 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:32:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:31,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:31,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:31,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:31,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2040524934, now seen corresponding path program 2 times [2023-09-01 01:32:31,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:31,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164479077] [2023-09-01 01:32:31,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:32:31,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:31,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:31,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:31,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 01:32:31,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:32:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:32:31,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:32:31,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:31,770 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:32:31,770 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 [2023-09-01 01:32:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:32:31,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:32:32,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:32,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164479077] [2023-09-01 01:32:32,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164479077] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:32,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:32,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:32:32,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984422080] [2023-09-01 01:32:32,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:32,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:32:32,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:32,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:32:32,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:32:36,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 744 [2023-09-01 01:32:36,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 288.0) internal successors, (3456), 12 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:36,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:36,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 744 [2023-09-01 01:32:36,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:38,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:40,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:41,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:43,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:44,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:46,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:48,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:50,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:51,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:53,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:54,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:56,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:58,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:32:59,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:33:01,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:33:02,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:33:09,186 INFO L130 PetriNetUnfolder]: 29761/41484 cut-off events. [2023-09-01 01:33:09,186 INFO L131 PetriNetUnfolder]: For 333/333 co-relation queries the response was YES. [2023-09-01 01:33:09,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83479 conditions, 41484 events. 29761/41484 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 251519 event pairs, 25565 based on Foata normal form. 28/14770 useless extension candidates. Maximal degree in co-relation 83465. Up to 8292 conditions per place. [2023-09-01 01:33:09,399 INFO L137 encePairwiseOnDemand]: 732/744 looper letters, 248 selfloop transitions, 46 changer transitions 0/294 dead transitions. [2023-09-01 01:33:09,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 294 transitions, 1499 flow [2023-09-01 01:33:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:33:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:33:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4635 transitions. [2023-09-01 01:33:09,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2023-09-01 01:33:09,418 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4635 transitions. [2023-09-01 01:33:09,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4635 transitions. [2023-09-01 01:33:09,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:09,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4635 transitions. [2023-09-01 01:33:09,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 309.0) internal successors, (4635), 15 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:09,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 744.0) internal successors, (11904), 16 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:09,444 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 744.0) internal successors, (11904), 16 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:09,444 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 313 flow. Second operand 15 states and 4635 transitions. [2023-09-01 01:33:09,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 294 transitions, 1499 flow [2023-09-01 01:33:09,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 294 transitions, 1467 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:33:09,451 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 657 flow [2023-09-01 01:33:09,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=657, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2023-09-01 01:33:09,453 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-09-01 01:33:09,453 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 657 flow [2023-09-01 01:33:09,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 288.0) internal successors, (3456), 12 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:09,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:09,455 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 01:33:09,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:09,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:09,662 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:09,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2057655290, now seen corresponding path program 3 times [2023-09-01 01:33:09,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:09,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191413733] [2023-09-01 01:33:09,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:33:09,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:09,664 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:09,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 01:33:09,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:33:09,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:33:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:33:09,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 01:33:09,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:33:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 01:33:10,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191413733] [2023-09-01 01:33:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191413733] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:33:10,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:33:10,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:33:10,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361257577] [2023-09-01 01:33:10,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:33:10,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:33:10,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:33:10,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:33:11,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-09-01 01:33:11,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 657 flow. Second operand has 14 states, 14 states have (on average 300.14285714285717) internal successors, (4202), 14 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:11,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:11,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-09-01 01:33:11,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:12,455 INFO L130 PetriNetUnfolder]: 5949/8304 cut-off events. [2023-09-01 01:33:12,455 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-09-01 01:33:12,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16788 conditions, 8304 events. 5949/8304 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41363 event pairs, 5113 based on Foata normal form. 3/2959 useless extension candidates. Maximal degree in co-relation 16769. Up to 8289 conditions per place. [2023-09-01 01:33:12,498 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2023-09-01 01:33:12,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 66 transitions, 445 flow [2023-09-01 01:33:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:33:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:33:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2461 transitions. [2023-09-01 01:33:12,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134744623655914 [2023-09-01 01:33:12,520 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2461 transitions. [2023-09-01 01:33:12,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2461 transitions. [2023-09-01 01:33:12,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:12,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2461 transitions. [2023-09-01 01:33:12,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 307.625) internal successors, (2461), 8 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:12,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:12,536 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:12,541 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 657 flow. Second operand 8 states and 2461 transitions. [2023-09-01 01:33:12,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 66 transitions, 445 flow [2023-09-01 01:33:12,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 366 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-09-01 01:33:12,544 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 270 flow [2023-09-01 01:33:12,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=69, 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=270, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-09-01 01:33:12,546 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-09-01 01:33:12,547 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 270 flow [2023-09-01 01:33:12,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 300.14285714285717) internal successors, (4202), 14 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:12,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:12,548 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-09-01 01:33:12,556 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 (7)] Ended with exit code 0 [2023-09-01 01:33:12,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:12,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:12,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1279646817, now seen corresponding path program 1 times [2023-09-01 01:33:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:12,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206986972] [2023-09-01 01:33:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:12,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:12,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:12,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 01:33:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:13,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:33:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:13,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:13,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:13,161 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 01:33:13,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 01:33:13,186 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 01:33:13,186 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 23 treesize of output 19 [2023-09-01 01:33:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:13,273 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 [2023-09-01 01:33:13,372 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:33:13,372 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 [2023-09-01 01:33:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:13,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:13,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206986972] [2023-09-01 01:33:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206986972] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:13,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:13,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:33:13,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016637157] [2023-09-01 01:33:13,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:33:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:33:13,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:33:13,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-09-01 01:33:13,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:13,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:13,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-09-01 01:33:13,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:14,648 INFO L130 PetriNetUnfolder]: 4605/6511 cut-off events. [2023-09-01 01:33:14,648 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 01:33:14,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13170 conditions, 6511 events. 4605/6511 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 31747 event pairs, 3945 based on Foata normal form. 0/2492 useless extension candidates. Maximal degree in co-relation 13157. Up to 6511 conditions per place. [2023-09-01 01:33:14,674 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-09-01 01:33:14,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 384 flow [2023-09-01 01:33:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:33:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:33:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2023-09-01 01:33:14,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368279569892473 [2023-09-01 01:33:14,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2023-09-01 01:33:14,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2023-09-01 01:33:14,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:14,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2023-09-01 01:33:14,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:14,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:14,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:14,681 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 270 flow. Second operand 3 states and 975 transitions. [2023-09-01 01:33:14,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 384 flow [2023-09-01 01:33:14,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 348 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 01:33:14,689 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 222 flow [2023-09-01 01:33:14,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=69, PETRI_TRANSITIONS=64} [2023-09-01 01:33:14,689 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-09-01 01:33:14,690 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 222 flow [2023-09-01 01:33:14,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:14,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:14,690 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-09-01 01:33:14,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:14,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:14,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:14,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1279646816, now seen corresponding path program 1 times [2023-09-01 01:33:14,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:14,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475085336] [2023-09-01 01:33:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:14,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:14,901 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:14,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 01:33:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 01:33:15,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:15,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:15,243 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 01:33:15,243 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 [2023-09-01 01:33:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:15,510 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 01:33:15,510 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 1 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 01:33:17,963 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-09-01 01:33:17,963 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-09-01 01:33:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:18,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:18,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475085336] [2023-09-01 01:33:18,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475085336] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:18,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:18,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:33:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701233454] [2023-09-01 01:33:18,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:33:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:33:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=6, Unknown=1, NotChecked=0, Total=12 [2023-09-01 01:33:20,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:21,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:24,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:26,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:28,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:30,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:32,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:35,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:37,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:38,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:40,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:33:42,404 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 [0] [2023-09-01 01:33:42,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 744 [2023-09-01 01:33:42,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 267.75) internal successors, (1071), 4 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:42,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:42,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 744 [2023-09-01 01:33:42,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:47,264 INFO L130 PetriNetUnfolder]: 3261/4718 cut-off events. [2023-09-01 01:33:47,264 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 01:33:47,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 4718 events. 3261/4718 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 22462 event pairs, 2777 based on Foata normal form. 0/2028 useless extension candidates. Maximal degree in co-relation 9549. Up to 4718 conditions per place. [2023-09-01 01:33:47,280 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-09-01 01:33:47,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 332 flow [2023-09-01 01:33:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:33:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:33:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 850 transitions. [2023-09-01 01:33:47,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38082437275985664 [2023-09-01 01:33:47,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 850 transitions. [2023-09-01 01:33:47,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 850 transitions. [2023-09-01 01:33:47,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:47,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 850 transitions. [2023-09-01 01:33:47,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:47,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:47,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:47,287 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 222 flow. Second operand 3 states and 850 transitions. [2023-09-01 01:33:47,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 332 flow [2023-09-01 01:33:47,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:33:47,288 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 209 flow [2023-09-01 01:33:47,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=68, PETRI_TRANSITIONS=62} [2023-09-01 01:33:47,290 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-09-01 01:33:47,290 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 209 flow [2023-09-01 01:33:47,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.75) internal successors, (1071), 4 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:47,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:47,290 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:47,305 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 (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:47,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:47,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:47,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1379914460, now seen corresponding path program 1 times [2023-09-01 01:33:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:47,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360897216] [2023-09-01 01:33:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:47,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:47,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:47,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 01:33:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:47,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:33:47,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:47,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:47,966 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 01:33:47,967 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 35 [2023-09-01 01:33:47,996 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 39 treesize of output 37 [2023-09-01 01:33:48,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:48,092 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 [2023-09-01 01:33:48,240 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:33:48,241 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 [2023-09-01 01:33:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:48,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:48,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:48,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360897216] [2023-09-01 01:33:48,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360897216] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:48,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:48,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:33:48,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299432779] [2023-09-01 01:33:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:48,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:33:48,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:33:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:33:48,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-09-01 01:33:48,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:48,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:48,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-09-01 01:33:48,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:49,418 INFO L130 PetriNetUnfolder]: 3141/4534 cut-off events. [2023-09-01 01:33:49,418 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 01:33:49,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9195 conditions, 4534 events. 3141/4534 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 21399 event pairs, 2673 based on Foata normal form. 0/1988 useless extension candidates. Maximal degree in co-relation 9182. Up to 4534 conditions per place. [2023-09-01 01:33:49,434 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 59 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-09-01 01:33:49,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 325 flow [2023-09-01 01:33:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:33:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:33:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 971 transitions. [2023-09-01 01:33:49,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350358422939068 [2023-09-01 01:33:49,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 971 transitions. [2023-09-01 01:33:49,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 971 transitions. [2023-09-01 01:33:49,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:49,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 971 transitions. [2023-09-01 01:33:49,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:49,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:49,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:49,440 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 209 flow. Second operand 3 states and 971 transitions. [2023-09-01 01:33:49,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 325 flow [2023-09-01 01:33:49,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:33:49,442 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 206 flow [2023-09-01 01:33:49,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, 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=67, PETRI_TRANSITIONS=60} [2023-09-01 01:33:49,443 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-09-01 01:33:49,443 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 206 flow [2023-09-01 01:33:49,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:49,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:49,443 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:49,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:49,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:49,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:49,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1379914459, now seen corresponding path program 1 times [2023-09-01 01:33:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:49,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716512366] [2023-09-01 01:33:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:49,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:49,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:49,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:49,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 01:33:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:49,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:33:49,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:50,075 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 01:33:50,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-09-01 01:33:50,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:50,200 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 [2023-09-01 01:33:50,284 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:33:50,285 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 [2023-09-01 01:33:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:50,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:50,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:50,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716512366] [2023-09-01 01:33:50,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716512366] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:50,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:50,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:33:50,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726956499] [2023-09-01 01:33:50,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:50,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:33:50,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:50,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:33:50,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:33:50,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 744 [2023-09-01 01:33:50,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:50,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:50,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 744 [2023-09-01 01:33:50,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:51,164 INFO L130 PetriNetUnfolder]: 3021/4350 cut-off events. [2023-09-01 01:33:51,164 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 01:33:51,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8828 conditions, 4350 events. 3021/4350 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 20450 event pairs, 2569 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 8815. Up to 4350 conditions per place. [2023-09-01 01:33:51,180 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-09-01 01:33:51,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 318 flow [2023-09-01 01:33:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:33:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:33:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2023-09-01 01:33:51,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368279569892473 [2023-09-01 01:33:51,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2023-09-01 01:33:51,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2023-09-01 01:33:51,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:51,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2023-09-01 01:33:51,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:51,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:51,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:51,206 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 206 flow. Second operand 3 states and 975 transitions. [2023-09-01 01:33:51,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 318 flow [2023-09-01 01:33:51,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:33:51,209 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 203 flow [2023-09-01 01:33:51,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=64, 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=66, PETRI_TRANSITIONS=58} [2023-09-01 01:33:51,210 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-09-01 01:33:51,210 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 203 flow [2023-09-01 01:33:51,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:51,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:51,211 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:51,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:51,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:51,415 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:51,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash 172327850, now seen corresponding path program 1 times [2023-09-01 01:33:51,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:51,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483261528] [2023-09-01 01:33:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:51,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:51,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:51,417 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:51,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 01:33:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:51,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:33:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:51,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:33:51,724 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 [2023-09-01 01:33:51,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:51,766 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 [2023-09-01 01:33:51,773 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:33:51,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:33:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:51,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:51,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483261528] [2023-09-01 01:33:51,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483261528] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:51,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:51,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:33:51,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262924408] [2023-09-01 01:33:51,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:51,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:33:51,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:51,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:33:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:33:52,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-09-01 01:33:52,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:52,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:52,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-09-01 01:33:52,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:53,000 INFO L130 PetriNetUnfolder]: 5349/7696 cut-off events. [2023-09-01 01:33:53,000 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 01:33:53,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15575 conditions, 7696 events. 5349/7696 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 42617 event pairs, 2569 based on Foata normal form. 0/3410 useless extension candidates. Maximal degree in co-relation 15562. Up to 4338 conditions per place. [2023-09-01 01:33:53,029 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 90 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-09-01 01:33:53,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 468 flow [2023-09-01 01:33:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:33:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:33:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1553 transitions. [2023-09-01 01:33:53,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174731182795699 [2023-09-01 01:33:53,032 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1553 transitions. [2023-09-01 01:33:53,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1553 transitions. [2023-09-01 01:33:53,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:53,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1553 transitions. [2023-09-01 01:33:53,035 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) [2023-09-01 01:33:53,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:53,038 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:53,038 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 203 flow. Second operand 5 states and 1553 transitions. [2023-09-01 01:33:53,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 468 flow [2023-09-01 01:33:53,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 467 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:33:53,039 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 218 flow [2023-09-01 01:33:53,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=65, 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=218, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-09-01 01:33:53,040 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2023-09-01 01:33:53,040 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 218 flow [2023-09-01 01:33:53,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:53,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:53,040 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:53,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:53,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:53,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:53,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash 172327785, now seen corresponding path program 1 times [2023-09-01 01:33:53,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:53,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727935638] [2023-09-01 01:33:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:53,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:53,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:53,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 01:33:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:33:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:53,591 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:33:53,591 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 [2023-09-01 01:33:53,623 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:33:53,623 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 [2023-09-01 01:33:53,643 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:33:53,643 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 [2023-09-01 01:33:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:53,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:53,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:53,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727935638] [2023-09-01 01:33:53,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727935638] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:53,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:53,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:33:53,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152694083] [2023-09-01 01:33:53,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:53,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:33:53,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:53,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:33:53,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:33:53,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-09-01 01:33:53,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:53,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:53,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-09-01 01:33:53,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:54,384 INFO L130 PetriNetUnfolder]: 4105/5928 cut-off events. [2023-09-01 01:33:54,384 INFO L131 PetriNetUnfolder]: For 857/857 co-relation queries the response was YES. [2023-09-01 01:33:54,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12674 conditions, 5928 events. 4105/5928 cut-off events. For 857/857 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29123 event pairs, 3527 based on Foata normal form. 0/2924 useless extension candidates. Maximal degree in co-relation 12660. Up to 5922 conditions per place. [2023-09-01 01:33:54,405 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 55 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-09-01 01:33:54,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 328 flow [2023-09-01 01:33:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:33:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:33:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1230 transitions. [2023-09-01 01:33:54,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41330645161290325 [2023-09-01 01:33:54,408 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1230 transitions. [2023-09-01 01:33:54,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1230 transitions. [2023-09-01 01:33:54,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:54,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1230 transitions. [2023-09-01 01:33:54,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:54,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:54,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:54,412 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 218 flow. Second operand 4 states and 1230 transitions. [2023-09-01 01:33:54,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 328 flow [2023-09-01 01:33:54,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:33:54,415 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 212 flow [2023-09-01 01:33:54,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-09-01 01:33:54,415 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-09-01 01:33:54,415 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 212 flow [2023-09-01 01:33:54,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:54,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:54,416 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:54,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:54,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:54,626 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:54,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash 172327851, now seen corresponding path program 1 times [2023-09-01 01:33:54,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:54,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875357184] [2023-09-01 01:33:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:54,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:54,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:54,628 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:54,630 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 (14)] Waiting until timeout for monitored process [2023-09-01 01:33:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:33:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:54,929 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 [2023-09-01 01:33:54,970 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:33:54,970 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 [2023-09-01 01:33:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:54,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:54,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:54,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875357184] [2023-09-01 01:33:54,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875357184] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:54,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:54,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:33:54,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117530683] [2023-09-01 01:33:54,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:54,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:33:54,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:33:54,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:33:55,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-09-01 01:33:55,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:55,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:55,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-09-01 01:33:55,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:55,720 INFO L130 PetriNetUnfolder]: 3065/4444 cut-off events. [2023-09-01 01:33:55,720 INFO L131 PetriNetUnfolder]: For 524/524 co-relation queries the response was YES. [2023-09-01 01:33:55,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9484 conditions, 4444 events. 3065/4444 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20810 event pairs, 2591 based on Foata normal form. 0/2384 useless extension candidates. Maximal degree in co-relation 9470. Up to 4432 conditions per place. [2023-09-01 01:33:55,738 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 53 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-09-01 01:33:55,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 318 flow [2023-09-01 01:33:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:33:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:33:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1228 transitions. [2023-09-01 01:33:55,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263440860215056 [2023-09-01 01:33:55,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1228 transitions. [2023-09-01 01:33:55,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1228 transitions. [2023-09-01 01:33:55,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:55,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1228 transitions. [2023-09-01 01:33:55,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:55,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:55,746 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:55,746 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 212 flow. Second operand 4 states and 1228 transitions. [2023-09-01 01:33:55,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 318 flow [2023-09-01 01:33:55,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:33:55,750 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 209 flow [2023-09-01 01:33:55,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2023-09-01 01:33:55,751 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-09-01 01:33:55,751 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 209 flow [2023-09-01 01:33:55,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:55,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:55,751 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:55,763 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 (14)] Ended with exit code 0 [2023-09-01 01:33:55,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:55,953 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:55,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:55,953 INFO L85 PathProgramCache]: Analyzing trace with hash 172327786, now seen corresponding path program 1 times [2023-09-01 01:33:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:55,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444015691] [2023-09-01 01:33:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:55,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:55,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:55,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:55,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 01:33:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:56,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:33:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:56,364 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:33:56,364 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 [2023-09-01 01:33:56,443 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:33:56,444 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 [2023-09-01 01:33:56,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:56,517 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 [2023-09-01 01:33:56,529 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:33:56,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:33:56,569 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:33:56,569 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 [2023-09-01 01:33:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:56,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:56,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:56,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444015691] [2023-09-01 01:33:56,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444015691] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:56,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:56,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:33:56,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595707791] [2023-09-01 01:33:56,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:56,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:33:56,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:56,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:33:56,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:33:56,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-09-01 01:33:56,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:56,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:56,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-09-01 01:33:56,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:57,497 INFO L130 PetriNetUnfolder]: 2797/4062 cut-off events. [2023-09-01 01:33:57,497 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-09-01 01:33:57,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8713 conditions, 4062 events. 2797/4062 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19897 event pairs, 1477 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 8699. Up to 2608 conditions per place. [2023-09-01 01:33:57,512 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-09-01 01:33:57,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 444 flow [2023-09-01 01:33:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:33:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:33:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1544 transitions. [2023-09-01 01:33:57,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150537634408602 [2023-09-01 01:33:57,516 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1544 transitions. [2023-09-01 01:33:57,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1544 transitions. [2023-09-01 01:33:57,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:57,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1544 transitions. [2023-09-01 01:33:57,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:57,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:57,523 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:57,523 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 209 flow. Second operand 5 states and 1544 transitions. [2023-09-01 01:33:57,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 444 flow [2023-09-01 01:33:57,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:33:57,525 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 218 flow [2023-09-01 01:33:57,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, 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=70, PETRI_TRANSITIONS=55} [2023-09-01 01:33:57,526 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2023-09-01 01:33:57,526 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 218 flow [2023-09-01 01:33:57,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:57,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:57,526 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:57,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:57,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:57,740 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:57,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1047128380, now seen corresponding path program 1 times [2023-09-01 01:33:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:57,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378969497] [2023-09-01 01:33:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:57,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:57,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:57,742 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:57,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 01:33:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:58,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:33:58,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:58,185 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:33:58,186 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 [2023-09-01 01:33:58,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 01:33:58,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:58,236 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 [2023-09-01 01:33:58,303 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:33:58,304 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 [2023-09-01 01:33:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:58,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:58,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:58,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378969497] [2023-09-01 01:33:58,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378969497] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:58,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:58,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:33:58,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568445374] [2023-09-01 01:33:58,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:58,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:33:58,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:58,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:33:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:33:59,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-09-01 01:33:59,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 307.2) internal successors, (1536), 5 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:59,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:59,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-09-01 01:33:59,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:59,648 INFO L130 PetriNetUnfolder]: 2659/3849 cut-off events. [2023-09-01 01:33:59,648 INFO L131 PetriNetUnfolder]: For 1345/1345 co-relation queries the response was YES. [2023-09-01 01:33:59,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8689 conditions, 3849 events. 2659/3849 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17508 event pairs, 2233 based on Foata normal form. 0/2284 useless extension candidates. Maximal degree in co-relation 8674. Up to 3849 conditions per place. [2023-09-01 01:33:59,668 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-09-01 01:33:59,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 53 transitions, 320 flow [2023-09-01 01:33:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:33:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:33:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-09-01 01:33:59,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-09-01 01:33:59,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-09-01 01:33:59,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-09-01 01:33:59,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:59,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-09-01 01:33:59,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:59,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:59,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:59,673 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 218 flow. Second operand 3 states and 957 transitions. [2023-09-01 01:33:59,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 53 transitions, 320 flow [2023-09-01 01:33:59,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:33:59,675 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 208 flow [2023-09-01 01:33:59,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=64, 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=66, PETRI_TRANSITIONS=53} [2023-09-01 01:33:59,675 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-09-01 01:33:59,675 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 208 flow [2023-09-01 01:33:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.2) internal successors, (1536), 5 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:59,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:59,676 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:59,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:59,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:59,890 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:59,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1047128379, now seen corresponding path program 1 times [2023-09-01 01:33:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:59,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635129794] [2023-09-01 01:33:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:59,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:59,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:59,898 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:59,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 01:34:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:00,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:34:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:00,233 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 01:34:00,233 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 [2023-09-01 01:34:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:34:00,275 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 [2023-09-01 01:34:00,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:34:00,318 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 [2023-09-01 01:34:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:00,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:34:00,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:00,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635129794] [2023-09-01 01:34:00,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635129794] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:34:00,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:34:00,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:34:00,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310379207] [2023-09-01 01:34:00,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:34:00,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:34:00,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:00,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:34:00,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:34:01,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 744 [2023-09-01 01:34:01,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 208 flow. Second operand has 5 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) [2023-09-01 01:34:01,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:01,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 744 [2023-09-01 01:34:01,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:02,385 INFO L130 PetriNetUnfolder]: 2521/3636 cut-off events. [2023-09-01 01:34:02,385 INFO L131 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2023-09-01 01:34:02,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8006 conditions, 3636 events. 2521/3636 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16396 event pairs, 2113 based on Foata normal form. 0/2204 useless extension candidates. Maximal degree in co-relation 7991. Up to 3636 conditions per place. [2023-09-01 01:34:02,398 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 01:34:02,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 306 flow [2023-09-01 01:34:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:34:02,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:34:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 949 transitions. [2023-09-01 01:34:02,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425179211469534 [2023-09-01 01:34:02,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 949 transitions. [2023-09-01 01:34:02,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 949 transitions. [2023-09-01 01:34:02,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:02,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 949 transitions. [2023-09-01 01:34:02,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:02,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:02,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:02,404 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 208 flow. Second operand 3 states and 949 transitions. [2023-09-01 01:34:02,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 306 flow [2023-09-01 01:34:02,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:34:02,405 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 205 flow [2023-09-01 01:34:02,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=65, PETRI_TRANSITIONS=51} [2023-09-01 01:34:02,407 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-09-01 01:34:02,407 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 205 flow [2023-09-01 01:34:02,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2023-09-01 01:34:02,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:02,407 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:02,417 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 (17)] Ended with exit code 0 [2023-09-01 01:34:02,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:02,617 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:02,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1896615663, now seen corresponding path program 1 times [2023-09-01 01:34:02,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:02,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119298112] [2023-09-01 01:34:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:02,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:02,619 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:02,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 01:34:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:34:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:03,018 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 [2023-09-01 01:34:03,072 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:34:03,072 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 [2023-09-01 01:34:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:03,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:34:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:03,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:03,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119298112] [2023-09-01 01:34:03,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119298112] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:34:03,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:34:03,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:34:03,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850151324] [2023-09-01 01:34:03,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:34:03,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:34:03,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:34:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:34:06,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-09-01 01:34:06,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 205 flow. Second operand has 10 states, 10 states have (on average 301.2) internal successors, (3012), 10 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:06,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:06,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-09-01 01:34:06,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:08,387 INFO L130 PetriNetUnfolder]: 5941/8550 cut-off events. [2023-09-01 01:34:08,388 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-09-01 01:34:08,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18531 conditions, 8550 events. 5941/8550 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 44611 event pairs, 1325 based on Foata normal form. 300/5438 useless extension candidates. Maximal degree in co-relation 18516. Up to 2326 conditions per place. [2023-09-01 01:34:08,427 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 154 selfloop transitions, 7 changer transitions 0/161 dead transitions. [2023-09-01 01:34:08,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 161 transitions, 779 flow [2023-09-01 01:34:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:34:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:34:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2544 transitions. [2023-09-01 01:34:08,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2023-09-01 01:34:08,434 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2544 transitions. [2023-09-01 01:34:08,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2544 transitions. [2023-09-01 01:34:08,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:08,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2544 transitions. [2023-09-01 01:34:08,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 318.0) internal successors, (2544), 8 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:08,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:08,440 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:08,447 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 205 flow. Second operand 8 states and 2544 transitions. [2023-09-01 01:34:08,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 161 transitions, 779 flow [2023-09-01 01:34:08,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 161 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:34:08,449 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 244 flow [2023-09-01 01:34:08,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, 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=74, PETRI_TRANSITIONS=54} [2023-09-01 01:34:08,455 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-09-01 01:34:08,455 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 244 flow [2023-09-01 01:34:08,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.2) internal successors, (3012), 10 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:08,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:08,456 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:08,469 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 (18)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:08,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:08,660 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:08,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:08,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1896615727, now seen corresponding path program 1 times [2023-09-01 01:34:08,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:08,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507757520] [2023-09-01 01:34:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:08,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:08,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:08,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:08,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 01:34:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:34:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:09,178 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:34:09,178 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 [2023-09-01 01:34:09,245 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:34:09,246 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 [2023-09-01 01:34:09,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:34:09,305 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 [2023-09-01 01:34:09,313 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:34:09,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:34:09,350 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:34:09,350 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 [2023-09-01 01:34:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:09,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:34:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:11,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507757520] [2023-09-01 01:34:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507757520] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:34:11,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:34:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-09-01 01:34:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805682938] [2023-09-01 01:34:11,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:34:11,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:34:11,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:34:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:34:14,023 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] [2023-09-01 01:34:19,402 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] [2023-09-01 01:34:20,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 744 [2023-09-01 01:34:20,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 244 flow. Second operand has 11 states, 11 states have (on average 293.1818181818182) internal successors, (3225), 11 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:20,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:20,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 744 [2023-09-01 01:34:20,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:21,987 INFO L130 PetriNetUnfolder]: 5221/7530 cut-off events. [2023-09-01 01:34:21,987 INFO L131 PetriNetUnfolder]: For 2794/2794 co-relation queries the response was YES. [2023-09-01 01:34:21,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17372 conditions, 7530 events. 5221/7530 cut-off events. For 2794/2794 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 38559 event pairs, 901 based on Foata normal form. 300/4754 useless extension candidates. Maximal degree in co-relation 17354. Up to 1978 conditions per place. [2023-09-01 01:34:22,011 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 148 selfloop transitions, 10 changer transitions 0/158 dead transitions. [2023-09-01 01:34:22,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 158 transitions, 788 flow [2023-09-01 01:34:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:34:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:34:22,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2476 transitions. [2023-09-01 01:34:22,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415994623655914 [2023-09-01 01:34:22,015 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2476 transitions. [2023-09-01 01:34:22,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2476 transitions. [2023-09-01 01:34:22,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:22,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2476 transitions. [2023-09-01 01:34:22,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 309.5) internal successors, (2476), 8 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:22,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:22,022 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:22,022 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 244 flow. Second operand 8 states and 2476 transitions. [2023-09-01 01:34:22,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 158 transitions, 788 flow [2023-09-01 01:34:22,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 158 transitions, 777 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:34:22,040 INFO L231 Difference]: Finished difference. Result has 82 places, 55 transitions, 278 flow [2023-09-01 01:34:22,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=71, 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=82, PETRI_TRANSITIONS=55} [2023-09-01 01:34:22,040 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2023-09-01 01:34:22,040 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 55 transitions, 278 flow [2023-09-01 01:34:22,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 293.1818181818182) internal successors, (3225), 11 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:22,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:22,041 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:22,052 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 (19)] Ended with exit code 0 [2023-09-01 01:34:22,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:22,255 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:22,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756566, now seen corresponding path program 1 times [2023-09-01 01:34:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:22,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112992417] [2023-09-01 01:34:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:22,257 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:22,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 01:34:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:22,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:34:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:22,634 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 [2023-09-01 01:34:22,637 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:34:22,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:34:22,681 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 [2023-09-01 01:34:22,689 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:34:22,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:34:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:22,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:34:22,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:22,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112992417] [2023-09-01 01:34:22,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112992417] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:34:22,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:34:22,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:34:22,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066524837] [2023-09-01 01:34:22,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:34:22,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:34:22,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:34:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:34:23,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-09-01 01:34:23,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 55 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 296.4) internal successors, (1482), 5 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:23,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:23,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-09-01 01:34:23,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:24,463 INFO L130 PetriNetUnfolder]: 8941/12880 cut-off events. [2023-09-01 01:34:24,463 INFO L131 PetriNetUnfolder]: For 11891/11891 co-relation queries the response was YES. [2023-09-01 01:34:24,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32697 conditions, 12880 events. 8941/12880 cut-off events. For 11891/11891 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 72064 event pairs, 4477 based on Foata normal form. 0/8408 useless extension candidates. Maximal degree in co-relation 32675. Up to 7518 conditions per place. [2023-09-01 01:34:24,539 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-09-01 01:34:24,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 588 flow [2023-09-01 01:34:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:34:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:34:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1535 transitions. [2023-09-01 01:34:24,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263440860215056 [2023-09-01 01:34:24,542 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1535 transitions. [2023-09-01 01:34:24,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1535 transitions. [2023-09-01 01:34:24,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:24,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1535 transitions. [2023-09-01 01:34:24,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:24,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:24,546 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:24,546 INFO L175 Difference]: Start difference. First operand has 82 places, 55 transitions, 278 flow. Second operand 5 states and 1535 transitions. [2023-09-01 01:34:24,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 588 flow [2023-09-01 01:34:24,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 537 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-09-01 01:34:24,594 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 267 flow [2023-09-01 01:34:24,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=78, PETRI_TRANSITIONS=56} [2023-09-01 01:34:24,594 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2023-09-01 01:34:24,594 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 267 flow [2023-09-01 01:34:24,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.4) internal successors, (1482), 5 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:24,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:24,594 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:24,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:24,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:24,805 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:24,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756499, now seen corresponding path program 1 times [2023-09-01 01:34:24,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:24,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043294676] [2023-09-01 01:34:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:24,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:24,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:24,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 01:34:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:25,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:34:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:25,079 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 [2023-09-01 01:34:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:25,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:34:25,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:25,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043294676] [2023-09-01 01:34:25,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043294676] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:34:25,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:34:25,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:34:25,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441680744] [2023-09-01 01:34:25,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:34:25,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:34:25,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:25,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:34:25,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:34:25,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 744 [2023-09-01 01:34:25,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 302.4) internal successors, (1512), 5 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:25,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:25,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 744 [2023-09-01 01:34:25,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:26,701 INFO L130 PetriNetUnfolder]: 8209/11836 cut-off events. [2023-09-01 01:34:26,702 INFO L131 PetriNetUnfolder]: For 6331/6331 co-relation queries the response was YES. [2023-09-01 01:34:26,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29731 conditions, 11836 events. 8209/11836 cut-off events. For 6331/6331 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 65151 event pairs, 4477 based on Foata normal form. 0/8016 useless extension candidates. Maximal degree in co-relation 29712. Up to 7512 conditions per place. [2023-09-01 01:34:26,748 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-09-01 01:34:26,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 547 flow [2023-09-01 01:34:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:34:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:34:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1564 transitions. [2023-09-01 01:34:26,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204301075268817 [2023-09-01 01:34:26,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1564 transitions. [2023-09-01 01:34:26,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1564 transitions. [2023-09-01 01:34:26,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:26,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1564 transitions. [2023-09-01 01:34:26,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 312.8) internal successors, (1564), 5 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:26,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:26,755 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:26,755 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 267 flow. Second operand 5 states and 1564 transitions. [2023-09-01 01:34:26,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 547 flow [2023-09-01 01:34:26,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 541 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:34:26,760 INFO L231 Difference]: Finished difference. Result has 80 places, 56 transitions, 273 flow [2023-09-01 01:34:26,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=80, PETRI_TRANSITIONS=56} [2023-09-01 01:34:26,761 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2023-09-01 01:34:26,761 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 56 transitions, 273 flow [2023-09-01 01:34:26,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 302.4) internal successors, (1512), 5 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:26,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:26,761 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:26,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:26,971 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:26,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756500, now seen corresponding path program 1 times [2023-09-01 01:34:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178565783] [2023-09-01 01:34:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:26,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:26,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:26,973 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:26,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 01:34:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:34:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:27,246 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 [2023-09-01 01:34:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:27,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:34:27,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:27,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178565783] [2023-09-01 01:34:27,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178565783] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:34:27,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:34:27,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:34:27,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370447350] [2023-09-01 01:34:27,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:34:27,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:34:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:27,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:34:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:34:27,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-09-01 01:34:27,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 56 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:27,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:27,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-09-01 01:34:27,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:28,275 INFO L130 PetriNetUnfolder]: 5735/8304 cut-off events. [2023-09-01 01:34:28,275 INFO L131 PetriNetUnfolder]: For 5472/5472 co-relation queries the response was YES. [2023-09-01 01:34:28,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21958 conditions, 8304 events. 5735/8304 cut-off events. For 5472/5472 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 41952 event pairs, 4925 based on Foata normal form. 0/6360 useless extension candidates. Maximal degree in co-relation 21938. Up to 8286 conditions per place. [2023-09-01 01:34:28,314 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-09-01 01:34:28,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 54 transitions, 377 flow [2023-09-01 01:34:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:34:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:34:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1222 transitions. [2023-09-01 01:34:28,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106182795698925 [2023-09-01 01:34:28,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1222 transitions. [2023-09-01 01:34:28,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1222 transitions. [2023-09-01 01:34:28,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:28,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1222 transitions. [2023-09-01 01:34:28,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 305.5) internal successors, (1222), 4 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:28,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:28,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:28,320 INFO L175 Difference]: Start difference. First operand has 80 places, 56 transitions, 273 flow. Second operand 4 states and 1222 transitions. [2023-09-01 01:34:28,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 54 transitions, 377 flow [2023-09-01 01:34:28,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 54 transitions, 369 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:34:28,326 INFO L231 Difference]: Finished difference. Result has 77 places, 54 transitions, 265 flow [2023-09-01 01:34:28,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=77, PETRI_TRANSITIONS=54} [2023-09-01 01:34:28,326 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-09-01 01:34:28,327 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 54 transitions, 265 flow [2023-09-01 01:34:28,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:28,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:28,327 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:28,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:28,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:28,537 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:28,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash 656146374, now seen corresponding path program 1 times [2023-09-01 01:34:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:28,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957667742] [2023-09-01 01:34:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:28,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:28,539 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:28,541 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 (23)] Waiting until timeout for monitored process [2023-09-01 01:34:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:28,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:34:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:28,938 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 [2023-09-01 01:34:28,941 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 [2023-09-01 01:34:28,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:34:28,974 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 [2023-09-01 01:34:28,979 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:34:28,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:34:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:29,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:34:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:29,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:29,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957667742] [2023-09-01 01:34:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957667742] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:34:29,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:34:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:34:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563131853] [2023-09-01 01:34:29,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:34:29,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:34:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:34:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:34:33,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-09-01 01:34:33,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 54 transitions, 265 flow. Second operand has 10 states, 10 states have (on average 295.6) internal successors, (2956), 10 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:33,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:33,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-09-01 01:34:33,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:35,468 INFO L130 PetriNetUnfolder]: 12371/17780 cut-off events. [2023-09-01 01:34:35,469 INFO L131 PetriNetUnfolder]: For 11245/11245 co-relation queries the response was YES. [2023-09-01 01:34:35,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45128 conditions, 17780 events. 12371/17780 cut-off events. For 11245/11245 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 99208 event pairs, 2065 based on Foata normal form. 798/14246 useless extension candidates. Maximal degree in co-relation 45108. Up to 4194 conditions per place. [2023-09-01 01:34:35,558 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 158 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2023-09-01 01:34:35,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 167 transitions, 1043 flow [2023-09-01 01:34:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:34:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:34:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2477 transitions. [2023-09-01 01:34:35,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41616263440860213 [2023-09-01 01:34:35,561 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2477 transitions. [2023-09-01 01:34:35,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2477 transitions. [2023-09-01 01:34:35,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:35,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2477 transitions. [2023-09-01 01:34:35,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 309.625) internal successors, (2477), 8 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:35,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:35,567 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:35,568 INFO L175 Difference]: Start difference. First operand has 77 places, 54 transitions, 265 flow. Second operand 8 states and 2477 transitions. [2023-09-01 01:34:35,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 167 transitions, 1043 flow [2023-09-01 01:34:35,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 167 transitions, 1040 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:34:35,574 INFO L231 Difference]: Finished difference. Result has 86 places, 58 transitions, 317 flow [2023-09-01 01:34:35,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=86, PETRI_TRANSITIONS=58} [2023-09-01 01:34:35,576 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 21 predicate places. [2023-09-01 01:34:35,576 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 317 flow [2023-09-01 01:34:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 295.6) internal successors, (2956), 10 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:35,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:35,577 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:35,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:35,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:35,788 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:35,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash 655004069, now seen corresponding path program 1 times [2023-09-01 01:34:35,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:35,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437719381] [2023-09-01 01:34:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:35,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:35,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:35,791 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:35,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 01:34:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:34:36,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:36,129 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 [2023-09-01 01:34:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:36,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:34:36,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:36,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437719381] [2023-09-01 01:34:36,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437719381] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:34:36,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:34:36,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:34:36,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751318594] [2023-09-01 01:34:36,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:34:36,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:34:36,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:34:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:34:36,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 744 [2023-09-01 01:34:36,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 302.8) internal successors, (1514), 5 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:36,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:36,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 744 [2023-09-01 01:34:36,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:39,220 INFO L130 PetriNetUnfolder]: 18929/27160 cut-off events. [2023-09-01 01:34:39,220 INFO L131 PetriNetUnfolder]: For 29279/29279 co-relation queries the response was YES. [2023-09-01 01:34:39,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77781 conditions, 27160 events. 18929/27160 cut-off events. For 29279/29279 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 162327 event pairs, 10685 based on Foata normal form. 0/22196 useless extension candidates. Maximal degree in co-relation 77757. Up to 17762 conditions per place. [2023-09-01 01:34:39,409 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 86 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-09-01 01:34:39,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 666 flow [2023-09-01 01:34:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:34:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:34:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1559 transitions. [2023-09-01 01:34:39,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190860215053763 [2023-09-01 01:34:39,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1559 transitions. [2023-09-01 01:34:39,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1559 transitions. [2023-09-01 01:34:39,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:39,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1559 transitions. [2023-09-01 01:34:39,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 311.8) internal successors, (1559), 5 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:39,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:39,439 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:39,439 INFO L175 Difference]: Start difference. First operand has 86 places, 58 transitions, 317 flow. Second operand 5 states and 1559 transitions. [2023-09-01 01:34:39,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 666 flow [2023-09-01 01:34:39,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 643 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 01:34:39,475 INFO L231 Difference]: Finished difference. Result has 88 places, 59 transitions, 320 flow [2023-09-01 01:34:39,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=83, 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=88, PETRI_TRANSITIONS=59} [2023-09-01 01:34:39,476 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2023-09-01 01:34:39,476 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 59 transitions, 320 flow [2023-09-01 01:34:39,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 302.8) internal successors, (1514), 5 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:39,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:39,477 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:39,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:39,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:39,681 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:39,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:39,682 INFO L85 PathProgramCache]: Analyzing trace with hash 655003940, now seen corresponding path program 1 times [2023-09-01 01:34:39,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:39,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445351963] [2023-09-01 01:34:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:39,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:39,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:39,683 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:39,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 01:34:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:40,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:34:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:40,158 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:34:40,159 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 [2023-09-01 01:34:40,228 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:34:40,228 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 [2023-09-01 01:34:40,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:34:40,290 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 [2023-09-01 01:34:40,298 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:34:40,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:34:40,330 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:34:40,330 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 [2023-09-01 01:34:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:40,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:34:40,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:40,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445351963] [2023-09-01 01:34:40,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445351963] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:34:40,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:34:40,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:34:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512895606] [2023-09-01 01:34:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:34:40,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:34:40,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:40,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:34:40,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:34:40,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-09-01 01:34:40,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 59 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 296.8) internal successors, (1484), 5 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:40,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:40,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-09-01 01:34:40,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:43,257 INFO L130 PetriNetUnfolder]: 16743/24050 cut-off events. [2023-09-01 01:34:43,257 INFO L131 PetriNetUnfolder]: For 24508/24508 co-relation queries the response was YES. [2023-09-01 01:34:43,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71803 conditions, 24050 events. 16743/24050 cut-off events. For 24508/24508 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 140691 event pairs, 10685 based on Foata normal form. 0/21538 useless extension candidates. Maximal degree in co-relation 71778. Up to 17774 conditions per place. [2023-09-01 01:34:43,455 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 85 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-09-01 01:34:43,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 653 flow [2023-09-01 01:34:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:34:43,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:34:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1528 transitions. [2023-09-01 01:34:43,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410752688172043 [2023-09-01 01:34:43,457 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1528 transitions. [2023-09-01 01:34:43,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1528 transitions. [2023-09-01 01:34:43,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:43,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1528 transitions. [2023-09-01 01:34:43,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.6) internal successors, (1528), 5 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:43,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:43,461 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:43,461 INFO L175 Difference]: Start difference. First operand has 88 places, 59 transitions, 320 flow. Second operand 5 states and 1528 transitions. [2023-09-01 01:34:43,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 653 flow [2023-09-01 01:34:43,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 647 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:34:43,494 INFO L231 Difference]: Finished difference. Result has 90 places, 59 transitions, 326 flow [2023-09-01 01:34:43,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=85, 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=326, PETRI_PLACES=90, PETRI_TRANSITIONS=59} [2023-09-01 01:34:43,495 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 25 predicate places. [2023-09-01 01:34:43,495 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 59 transitions, 326 flow [2023-09-01 01:34:43,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.8) internal successors, (1484), 5 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:43,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:43,496 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:43,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:43,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:43,704 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:43,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash 656146441, now seen corresponding path program 1 times [2023-09-01 01:34:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:43,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573062188] [2023-09-01 01:34:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:43,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:43,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:43,706 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:43,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 01:34:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:44,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:34:44,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:44,030 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 [2023-09-01 01:34:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:44,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:34:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:44,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:44,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573062188] [2023-09-01 01:34:44,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573062188] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:34:44,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:34:44,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:34:44,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988516997] [2023-09-01 01:34:44,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:34:44,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:34:44,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:34:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:34:46,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-09-01 01:34:46,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 59 transitions, 326 flow. Second operand has 10 states, 10 states have (on average 301.4) internal successors, (3014), 10 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:46,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:46,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-09-01 01:34:46,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:49,218 INFO L130 PetriNetUnfolder]: 15543/22492 cut-off events. [2023-09-01 01:34:49,219 INFO L131 PetriNetUnfolder]: For 30503/30503 co-relation queries the response was YES. [2023-09-01 01:34:49,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69210 conditions, 22492 events. 15543/22492 cut-off events. For 30503/30503 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 130862 event pairs, 4417 based on Foata normal form. 1074/22040 useless extension candidates. Maximal degree in co-relation 69184. Up to 7434 conditions per place. [2023-09-01 01:34:49,495 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 163 selfloop transitions, 7 changer transitions 0/170 dead transitions. [2023-09-01 01:34:49,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 170 transitions, 1166 flow [2023-09-01 01:34:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:34:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:34:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2523 transitions. [2023-09-01 01:34:49,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42389112903225806 [2023-09-01 01:34:49,498 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2523 transitions. [2023-09-01 01:34:49,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2523 transitions. [2023-09-01 01:34:49,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:49,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2523 transitions. [2023-09-01 01:34:49,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 315.375) internal successors, (2523), 8 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:49,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:49,507 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:49,507 INFO L175 Difference]: Start difference. First operand has 90 places, 59 transitions, 326 flow. Second operand 8 states and 2523 transitions. [2023-09-01 01:34:49,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 170 transitions, 1166 flow [2023-09-01 01:34:49,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 170 transitions, 1140 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 01:34:49,591 INFO L231 Difference]: Finished difference. Result has 93 places, 59 transitions, 334 flow [2023-09-01 01:34:49,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=85, 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=334, PETRI_PLACES=93, PETRI_TRANSITIONS=59} [2023-09-01 01:34:49,591 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 28 predicate places. [2023-09-01 01:34:49,591 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 59 transitions, 334 flow [2023-09-01 01:34:49,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.4) internal successors, (3014), 10 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:49,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:49,592 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:49,603 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 (26)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:49,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:49,801 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:49,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1169704244, now seen corresponding path program 1 times [2023-09-01 01:34:49,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:49,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095521719] [2023-09-01 01:34:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:49,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:49,803 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:49,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 01:34:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:34:50,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:50,134 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 [2023-09-01 01:34:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:50,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:34:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:50,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:50,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095521719] [2023-09-01 01:34:50,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095521719] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:34:50,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:34:50,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:34:50,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706643422] [2023-09-01 01:34:50,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:34:50,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:34:50,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:50,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:34:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:34:52,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-09-01 01:34:52,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 59 transitions, 334 flow. Second operand has 10 states, 10 states have (on average 301.6) internal successors, (3016), 10 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:52,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:52,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-09-01 01:34:52,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:58,783 INFO L130 PetriNetUnfolder]: 33813/48814 cut-off events. [2023-09-01 01:34:58,783 INFO L131 PetriNetUnfolder]: For 69418/69418 co-relation queries the response was YES. [2023-09-01 01:34:59,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149096 conditions, 48814 events. 33813/48814 cut-off events. For 69418/69418 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 317514 event pairs, 10121 based on Foata normal form. 0/46550 useless extension candidates. Maximal degree in co-relation 149070. Up to 16608 conditions per place. [2023-09-01 01:34:59,206 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 178 selfloop transitions, 7 changer transitions 0/185 dead transitions. [2023-09-01 01:34:59,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 185 transitions, 1396 flow [2023-09-01 01:34:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:34:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:34:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2518 transitions. [2023-09-01 01:34:59,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230510752688172 [2023-09-01 01:34:59,210 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2518 transitions. [2023-09-01 01:34:59,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2518 transitions. [2023-09-01 01:34:59,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:59,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2518 transitions. [2023-09-01 01:34:59,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 314.75) internal successors, (2518), 8 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:59,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:59,215 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:59,215 INFO L175 Difference]: Start difference. First operand has 93 places, 59 transitions, 334 flow. Second operand 8 states and 2518 transitions. [2023-09-01 01:34:59,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 185 transitions, 1396 flow [2023-09-01 01:34:59,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 185 transitions, 1352 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:34:59,262 INFO L231 Difference]: Finished difference. Result has 97 places, 62 transitions, 362 flow [2023-09-01 01:34:59,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=362, PETRI_PLACES=97, PETRI_TRANSITIONS=62} [2023-09-01 01:34:59,263 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-09-01 01:34:59,263 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 62 transitions, 362 flow [2023-09-01 01:34:59,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.6) internal successors, (3016), 10 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:59,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:59,264 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:59,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-09-01 01:34:59,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:59,478 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:59,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1169704373, now seen corresponding path program 1 times [2023-09-01 01:34:59,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:59,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888416085] [2023-09-01 01:34:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:34:59,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:59,481 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:59,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 01:34:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:34:59,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:34:59,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:35:00,058 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:35:00,059 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 [2023-09-01 01:35:00,118 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:35:00,119 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 [2023-09-01 01:35:00,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:35:00,202 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 [2023-09-01 01:35:00,210 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:35:00,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:35:00,246 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:35:00,247 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 [2023-09-01 01:35:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:35:00,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:35:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:35:02,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:35:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888416085] [2023-09-01 01:35:02,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888416085] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:35:02,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:35:02,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-09-01 01:35:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976116274] [2023-09-01 01:35:02,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:35:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:35:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:35:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:35:02,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:35:05,286 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] [2023-09-01 01:35:08,223 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] [2023-09-01 01:35:09,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 744 [2023-09-01 01:35:09,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 62 transitions, 362 flow. Second operand has 11 states, 11 states have (on average 293.72727272727275) internal successors, (3231), 11 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:09,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:35:09,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 744 [2023-09-01 01:35:09,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:35:15,467 INFO L130 PetriNetUnfolder]: 27723/40090 cut-off events. [2023-09-01 01:35:15,468 INFO L131 PetriNetUnfolder]: For 61700/61700 co-relation queries the response was YES. [2023-09-01 01:35:15,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129823 conditions, 40090 events. 27723/40090 cut-off events. For 61700/61700 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 254088 event pairs, 8173 based on Foata normal form. 2634/41584 useless extension candidates. Maximal degree in co-relation 129794. Up to 13712 conditions per place. [2023-09-01 01:35:15,910 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 174 selfloop transitions, 8 changer transitions 0/182 dead transitions. [2023-09-01 01:35:15,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 182 transitions, 1362 flow [2023-09-01 01:35:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:35:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:35:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2451 transitions. [2023-09-01 01:35:15,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117943548387097 [2023-09-01 01:35:15,913 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2451 transitions. [2023-09-01 01:35:15,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2451 transitions. [2023-09-01 01:35:15,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:35:15,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2451 transitions. [2023-09-01 01:35:15,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 306.375) internal successors, (2451), 8 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:15,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:15,918 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:15,918 INFO L175 Difference]: Start difference. First operand has 97 places, 62 transitions, 362 flow. Second operand 8 states and 2451 transitions. [2023-09-01 01:35:15,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 182 transitions, 1362 flow [2023-09-01 01:35:16,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 182 transitions, 1351 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:35:16,366 INFO L231 Difference]: Finished difference. Result has 104 places, 62 transitions, 380 flow [2023-09-01 01:35:16,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=380, PETRI_PLACES=104, PETRI_TRANSITIONS=62} [2023-09-01 01:35:16,367 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 39 predicate places. [2023-09-01 01:35:16,367 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 62 transitions, 380 flow [2023-09-01 01:35:16,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 293.72727272727275) internal successors, (3231), 11 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:16,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:35:16,368 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:35:16,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 01:35:16,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:16,570 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:35:16,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:35:16,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1583406364, now seen corresponding path program 2 times [2023-09-01 01:35:16,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:35:16,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031311279] [2023-09-01 01:35:16,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:35:16,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:16,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:35:16,574 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:35:16,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 01:35:17,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:35:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:35:17,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:35:17,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:35:17,128 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:35:17,129 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 [2023-09-01 01:35:17,211 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:35:17,211 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 [2023-09-01 01:35:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:35:17,265 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 [2023-09-01 01:35:17,272 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:35:17,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:35:17,299 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:35:17,300 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 [2023-09-01 01:35:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:35:17,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:35:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:35:20,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:35:20,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031311279] [2023-09-01 01:35:20,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031311279] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:35:20,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:35:20,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-09-01 01:35:20,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637637649] [2023-09-01 01:35:20,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:35:20,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 01:35:20,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:35:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 01:35:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-09-01 01:35:23,041 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] [2023-09-01 01:35:29,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:33,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:37,438 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] [2023-09-01 01:35:41,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 744 [2023-09-01 01:35:41,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 62 transitions, 380 flow. Second operand has 17 states, 17 states have (on average 291.11764705882354) internal successors, (4949), 17 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:41,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:35:41,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 744 [2023-09-01 01:35:41,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:35:48,396 INFO L130 PetriNetUnfolder]: 33813/48864 cut-off events. [2023-09-01 01:35:48,397 INFO L131 PetriNetUnfolder]: For 102355/102355 co-relation queries the response was YES. [2023-09-01 01:35:48,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167187 conditions, 48864 events. 33813/48864 cut-off events. For 102355/102355 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 316695 event pairs, 8173 based on Foata normal form. 878/48356 useless extension candidates. Maximal degree in co-relation 167155. Up to 13712 conditions per place. [2023-09-01 01:35:48,945 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 232 selfloop transitions, 9 changer transitions 0/241 dead transitions. [2023-09-01 01:35:48,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 241 transitions, 1828 flow [2023-09-01 01:35:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:35:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:35:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3050 transitions. [2023-09-01 01:35:48,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099462365591398 [2023-09-01 01:35:48,948 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3050 transitions. [2023-09-01 01:35:48,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3050 transitions. [2023-09-01 01:35:48,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:35:48,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3050 transitions. [2023-09-01 01:35:48,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:48,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:48,954 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:48,954 INFO L175 Difference]: Start difference. First operand has 104 places, 62 transitions, 380 flow. Second operand 10 states and 3050 transitions. [2023-09-01 01:35:48,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 241 transitions, 1828 flow [2023-09-01 01:35:49,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 241 transitions, 1797 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-09-01 01:35:49,885 INFO L231 Difference]: Finished difference. Result has 106 places, 64 transitions, 398 flow [2023-09-01 01:35:49,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=398, PETRI_PLACES=106, PETRI_TRANSITIONS=64} [2023-09-01 01:35:49,886 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-09-01 01:35:49,886 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 64 transitions, 398 flow [2023-09-01 01:35:49,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 291.11764705882354) internal successors, (4949), 17 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:49,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:35:49,886 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:35:49,903 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 (29)] Ended with exit code 0 [2023-09-01 01:35:50,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:50,103 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:35:50,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:35:50,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1583406235, now seen corresponding path program 2 times [2023-09-01 01:35:50,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:35:50,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938900701] [2023-09-01 01:35:50,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:35:50,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:50,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:35:50,105 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:35:50,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 01:35:50,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:35:50,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:35:50,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 01:35:50,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:35:50,409 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:35:50,409 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 [2023-09-01 01:35:50,483 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:35:50,483 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 [2023-09-01 01:35:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:35:50,536 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 [2023-09-01 01:35:50,544 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:35:50,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:35:50,578 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:35:50,578 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 [2023-09-01 01:35:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 01:35:50,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:35:50,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:35:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938900701] [2023-09-01 01:35:50,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938900701] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:35:50,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:35:50,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:35:50,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036726459] [2023-09-01 01:35:50,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:35:50,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:35:50,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:35:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:35:50,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:35:51,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-09-01 01:35:51,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 64 transitions, 398 flow. Second operand has 6 states, 6 states have (on average 294.5) internal successors, (1767), 6 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:51,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:35:51,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-09-01 01:35:51,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:35:56,495 INFO L130 PetriNetUnfolder]: 29753/43048 cut-off events. [2023-09-01 01:35:56,495 INFO L131 PetriNetUnfolder]: For 90855/90855 co-relation queries the response was YES. [2023-09-01 01:35:56,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144981 conditions, 43048 events. 29753/43048 cut-off events. For 90855/90855 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 269759 event pairs, 27653 based on Foata normal form. 1756/43582 useless extension candidates. Maximal degree in co-relation 144950. Up to 43030 conditions per place. [2023-09-01 01:35:57,002 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 59 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-09-01 01:35:57,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 62 transitions, 505 flow [2023-09-01 01:35:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:35:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:35:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1496 transitions. [2023-09-01 01:35:57,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021505376344086 [2023-09-01 01:35:57,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1496 transitions. [2023-09-01 01:35:57,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1496 transitions. [2023-09-01 01:35:57,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:35:57,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1496 transitions. [2023-09-01 01:35:57,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.2) internal successors, (1496), 5 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:57,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:57,008 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:57,008 INFO L175 Difference]: Start difference. First operand has 106 places, 64 transitions, 398 flow. Second operand 5 states and 1496 transitions. [2023-09-01 01:35:57,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 62 transitions, 505 flow [2023-09-01 01:35:57,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 62 transitions, 477 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-09-01 01:35:57,190 INFO L231 Difference]: Finished difference. Result has 98 places, 62 transitions, 359 flow [2023-09-01 01:35:57,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=98, PETRI_TRANSITIONS=62} [2023-09-01 01:35:57,192 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-09-01 01:35:57,192 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 62 transitions, 359 flow [2023-09-01 01:35:57,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 294.5) internal successors, (1767), 6 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:57,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:35:57,192 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:35:57,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-09-01 01:35:57,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:57,401 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:35:57,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:35:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1059227334, now seen corresponding path program 2 times [2023-09-01 01:35:57,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:35:57,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946403268] [2023-09-01 01:35:57,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:35:57,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:57,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:35:57,402 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:35:57,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 01:35:57,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:35:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:35:57,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 01:35:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:35:57,718 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:35:57,718 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 [2023-09-01 01:35:57,790 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:35:57,791 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 [2023-09-01 01:35:57,865 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:35:57,866 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 [2023-09-01 01:35:57,876 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 [2023-09-01 01:35:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:35:57,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:35:57,983 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 [2023-09-01 01:35:58,001 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-09-01 01:35:58,001 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 [2023-09-01 01:35:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-09-01 01:35:58,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:35:58,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:35:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946403268] [2023-09-01 01:35:58,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946403268] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:35:58,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:35:58,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:35:58,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703480107] [2023-09-01 01:35:58,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:35:58,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:35:58,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:35:58,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:35:58,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:35:58,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-09-01 01:35:58,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 62 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 295.4) internal successors, (1477), 5 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:58,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:35:58,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-09-01 01:35:58,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:36:04,252 INFO L130 PetriNetUnfolder]: 28419/41172 cut-off events. [2023-09-01 01:36:04,252 INFO L131 PetriNetUnfolder]: For 53594/53594 co-relation queries the response was YES. [2023-09-01 01:36:04,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129008 conditions, 41172 events. 28419/41172 cut-off events. For 53594/53594 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 257373 event pairs, 26385 based on Foata normal form. 0/40522 useless extension candidates. Maximal degree in co-relation 128979. Up to 41160 conditions per place. [2023-09-01 01:36:04,730 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 58 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-09-01 01:36:04,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 61 transitions, 475 flow [2023-09-01 01:36:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:36:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:36:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1500 transitions. [2023-09-01 01:36:04,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2023-09-01 01:36:04,732 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1500 transitions. [2023-09-01 01:36:04,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1500 transitions. [2023-09-01 01:36:04,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:36:04,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1500 transitions. [2023-09-01 01:36:04,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:04,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:04,736 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:04,736 INFO L175 Difference]: Start difference. First operand has 98 places, 62 transitions, 359 flow. Second operand 5 states and 1500 transitions. [2023-09-01 01:36:04,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 61 transitions, 475 flow [2023-09-01 01:36:04,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 61 transitions, 470 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:36:04,896 INFO L231 Difference]: Finished difference. Result has 98 places, 61 transitions, 354 flow [2023-09-01 01:36:04,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=94, 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=354, PETRI_PLACES=98, PETRI_TRANSITIONS=61} [2023-09-01 01:36:04,896 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-09-01 01:36:04,896 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 61 transitions, 354 flow [2023-09-01 01:36:04,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 295.4) internal successors, (1477), 5 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:04,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:36:04,897 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:36:04,904 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 (31)] Ended with exit code 0 [2023-09-01 01:36:05,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:05,099 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:36:05,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:36:05,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1059227270, now seen corresponding path program 2 times [2023-09-01 01:36:05,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:36:05,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564177852] [2023-09-01 01:36:05,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:36:05,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:05,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:36:05,101 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:36:05,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-09-01 01:36:05,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:36:05,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:36:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:36:05,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:36:05,590 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:36:05,590 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 [2023-09-01 01:36:05,658 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:36:05,659 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 [2023-09-01 01:36:05,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:36:05,716 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 [2023-09-01 01:36:05,722 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:36:05,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:36:05,751 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:36:05,751 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 [2023-09-01 01:36:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:05,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:36:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:08,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:36:08,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564177852] [2023-09-01 01:36:08,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564177852] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:36:08,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:36:08,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-09-01 01:36:08,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044241889] [2023-09-01 01:36:08,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:36:08,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 01:36:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:36:08,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 01:36:08,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-09-01 01:36:13,797 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] [2023-09-01 01:36:19,813 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] [2023-09-01 01:36:24,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 744 [2023-09-01 01:36:24,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 61 transitions, 354 flow. Second operand has 17 states, 17 states have (on average 293.11764705882354) internal successors, (4983), 17 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:24,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:36:24,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 744 [2023-09-01 01:36:24,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:36:31,854 INFO L130 PetriNetUnfolder]: 33569/48652 cut-off events. [2023-09-01 01:36:31,855 INFO L131 PetriNetUnfolder]: For 79297/79297 co-relation queries the response was YES. [2023-09-01 01:36:32,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152694 conditions, 48652 events. 33569/48652 cut-off events. For 79297/79297 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 314818 event pairs, 5605 based on Foata normal form. 542/48426 useless extension candidates. Maximal degree in co-relation 152665. Up to 9370 conditions per place. [2023-09-01 01:36:32,418 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 241 selfloop transitions, 10 changer transitions 0/251 dead transitions. [2023-09-01 01:36:32,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 251 transitions, 1783 flow [2023-09-01 01:36:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:36:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:36:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3080 transitions. [2023-09-01 01:36:32,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2023-09-01 01:36:32,422 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3080 transitions. [2023-09-01 01:36:32,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3080 transitions. [2023-09-01 01:36:32,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:36:32,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3080 transitions. [2023-09-01 01:36:32,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 308.0) internal successors, (3080), 10 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:32,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:32,436 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:32,437 INFO L175 Difference]: Start difference. First operand has 98 places, 61 transitions, 354 flow. Second operand 10 states and 3080 transitions. [2023-09-01 01:36:32,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 251 transitions, 1783 flow [2023-09-01 01:36:32,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 251 transitions, 1778 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:36:32,800 INFO L231 Difference]: Finished difference. Result has 106 places, 63 transitions, 394 flow [2023-09-01 01:36:32,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=95, 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=394, PETRI_PLACES=106, PETRI_TRANSITIONS=63} [2023-09-01 01:36:32,800 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-09-01 01:36:32,800 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 63 transitions, 394 flow [2023-09-01 01:36:32,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 293.11764705882354) internal successors, (4983), 17 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:32,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:36:32,801 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:36:32,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-09-01 01:36:33,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:33,017 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:36:33,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:36:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1840947061, now seen corresponding path program 3 times [2023-09-01 01:36:33,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:36:33,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712049876] [2023-09-01 01:36:33,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:36:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:33,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:36:33,020 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:36:33,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-09-01 01:36:33,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 01:36:33,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:36:33,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:36:33,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:36:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:33,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:36:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:33,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:36:33,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712049876] [2023-09-01 01:36:33,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712049876] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:36:33,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:36:33,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:36:33,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766307051] [2023-09-01 01:36:33,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:36:33,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:36:33,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:36:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:36:33,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:36:34,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-09-01 01:36:34,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 63 transitions, 394 flow. Second operand has 14 states, 14 states have (on average 315.85714285714283) internal successors, (4422), 14 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:34,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:36:34,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-09-01 01:36:34,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:36:40,520 INFO L130 PetriNetUnfolder]: 30281/44368 cut-off events. [2023-09-01 01:36:40,520 INFO L131 PetriNetUnfolder]: For 89001/89001 co-relation queries the response was YES. [2023-09-01 01:36:40,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141250 conditions, 44368 events. 30281/44368 cut-off events. For 89001/89001 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 291336 event pairs, 2611 based on Foata normal form. 1992/45644 useless extension candidates. Maximal degree in co-relation 141219. Up to 6636 conditions per place. [2023-09-01 01:36:41,005 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 238 selfloop transitions, 6 changer transitions 0/244 dead transitions. [2023-09-01 01:36:41,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 244 transitions, 2015 flow [2023-09-01 01:36:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:36:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:36:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2662 transitions. [2023-09-01 01:36:41,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447244623655914 [2023-09-01 01:36:41,008 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2662 transitions. [2023-09-01 01:36:41,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2662 transitions. [2023-09-01 01:36:41,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:36:41,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2662 transitions. [2023-09-01 01:36:41,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 332.75) internal successors, (2662), 8 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:41,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:41,013 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:41,013 INFO L175 Difference]: Start difference. First operand has 106 places, 63 transitions, 394 flow. Second operand 8 states and 2662 transitions. [2023-09-01 01:36:41,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 244 transitions, 2015 flow [2023-09-01 01:36:41,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 244 transitions, 1900 flow, removed 14 selfloop flow, removed 13 redundant places. [2023-09-01 01:36:41,747 INFO L231 Difference]: Finished difference. Result has 99 places, 61 transitions, 357 flow [2023-09-01 01:36:41,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=92, 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=99, PETRI_TRANSITIONS=61} [2023-09-01 01:36:41,748 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-09-01 01:36:41,748 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 61 transitions, 357 flow [2023-09-01 01:36:41,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 315.85714285714283) internal successors, (4422), 14 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:41,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:36:41,749 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:36:41,761 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 [2023-09-01 01:36:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:41,950 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:36:41,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:36:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash 459104989, now seen corresponding path program 2 times [2023-09-01 01:36:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:36:41,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891378069] [2023-09-01 01:36:41,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:36:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:36:41,952 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:36:41,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-09-01 01:36:42,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:36:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:36:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 01:36:42,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:36:42,196 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 [2023-09-01 01:36:42,201 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 [2023-09-01 01:36:42,249 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:36:42,249 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 [2023-09-01 01:36:42,262 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:36:42,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:36:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-09-01 01:36:42,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:36:42,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:36:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891378069] [2023-09-01 01:36:42,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891378069] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:36:42,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:36:42,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:36:42,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174958886] [2023-09-01 01:36:42,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:36:42,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:36:42,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:36:42,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:36:42,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:36:42,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-09-01 01:36:42,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 61 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:42,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:36:42,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-09-01 01:36:42,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:36:47,942 INFO L130 PetriNetUnfolder]: 28641/42012 cut-off events. [2023-09-01 01:36:47,943 INFO L131 PetriNetUnfolder]: For 48627/48627 co-relation queries the response was YES. [2023-09-01 01:36:48,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129956 conditions, 42012 events. 28641/42012 cut-off events. For 48627/48627 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 269610 event pairs, 27447 based on Foata normal form. 0/42012 useless extension candidates. Maximal degree in co-relation 129930. Up to 41994 conditions per place. [2023-09-01 01:36:48,348 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 57 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-09-01 01:36:48,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 60 transitions, 471 flow [2023-09-01 01:36:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:36:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:36:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1493 transitions. [2023-09-01 01:36:48,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013440860215054 [2023-09-01 01:36:48,351 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1493 transitions. [2023-09-01 01:36:48,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1493 transitions. [2023-09-01 01:36:48,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:36:48,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1493 transitions. [2023-09-01 01:36:48,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.6) internal successors, (1493), 5 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:48,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:48,379 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:48,379 INFO L175 Difference]: Start difference. First operand has 99 places, 61 transitions, 357 flow. Second operand 5 states and 1493 transitions. [2023-09-01 01:36:48,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 60 transitions, 471 flow [2023-09-01 01:36:48,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 60 transitions, 460 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:36:48,506 INFO L231 Difference]: Finished difference. Result has 96 places, 60 transitions, 346 flow [2023-09-01 01:36:48,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=92, 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=96, PETRI_TRANSITIONS=60} [2023-09-01 01:36:48,507 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2023-09-01 01:36:48,507 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 60 transitions, 346 flow [2023-09-01 01:36:48,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:48,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:36:48,507 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:36:48,517 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 [2023-09-01 01:36:48,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:48,715 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:36:48,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:36:48,715 INFO L85 PathProgramCache]: Analyzing trace with hash 459104922, now seen corresponding path program 2 times [2023-09-01 01:36:48,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:36:48,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311196201] [2023-09-01 01:36:48,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:36:48,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:48,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:36:48,718 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:36:48,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-09-01 01:36:49,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:36:49,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:36:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:36:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:36:49,175 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 [2023-09-01 01:36:49,179 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 [2023-09-01 01:36:49,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:36:49,226 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 [2023-09-01 01:36:49,235 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:36:49,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:36:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:49,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:36:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:49,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:36:49,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311196201] [2023-09-01 01:36:49,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311196201] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:36:49,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:36:49,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-09-01 01:36:49,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744428844] [2023-09-01 01:36:49,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:36:49,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:36:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:36:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:36:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:36:52,986 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] [2023-09-01 01:36:58,138 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] [2023-09-01 01:37:01,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 744 [2023-09-01 01:37:01,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 60 transitions, 346 flow. Second operand has 16 states, 16 states have (on average 293.375) internal successors, (4694), 16 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:01,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:01,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 744 [2023-09-01 01:37:01,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:08,032 INFO L130 PetriNetUnfolder]: 33705/49452 cut-off events. [2023-09-01 01:37:08,032 INFO L131 PetriNetUnfolder]: For 64511/64511 co-relation queries the response was YES. [2023-09-01 01:37:08,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147791 conditions, 49452 events. 33705/49452 cut-off events. For 64511/64511 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 324768 event pairs, 5915 based on Foata normal form. 716/50168 useless extension candidates. Maximal degree in co-relation 147765. Up to 9884 conditions per place. [2023-09-01 01:37:08,598 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 224 selfloop transitions, 10 changer transitions 0/234 dead transitions. [2023-09-01 01:37:08,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 234 transitions, 1662 flow [2023-09-01 01:37:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:37:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:37:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3056 transitions. [2023-09-01 01:37:08,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410752688172043 [2023-09-01 01:37:08,602 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3056 transitions. [2023-09-01 01:37:08,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3056 transitions. [2023-09-01 01:37:08,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:08,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3056 transitions. [2023-09-01 01:37:08,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 305.6) internal successors, (3056), 10 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:08,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:08,608 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:08,608 INFO L175 Difference]: Start difference. First operand has 96 places, 60 transitions, 346 flow. Second operand 10 states and 3056 transitions. [2023-09-01 01:37:08,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 234 transitions, 1662 flow [2023-09-01 01:37:09,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 234 transitions, 1657 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:37:09,175 INFO L231 Difference]: Finished difference. Result has 104 places, 62 transitions, 386 flow [2023-09-01 01:37:09,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=93, 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=104, PETRI_TRANSITIONS=62} [2023-09-01 01:37:09,176 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 39 predicate places. [2023-09-01 01:37:09,176 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 62 transitions, 386 flow [2023-09-01 01:37:09,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 293.375) internal successors, (4694), 16 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:09,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:09,177 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:09,190 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 [2023-09-01 01:37:09,388 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 [2023-09-01 01:37:09,388 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:09,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 10263789, now seen corresponding path program 3 times [2023-09-01 01:37:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:09,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630659666] [2023-09-01 01:37:09,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:37:09,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:09,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:09,390 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) [2023-09-01 01:37:09,392 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 [2023-09-01 01:37:10,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:37:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:37:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:10,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:37:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:10,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:10,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630659666] [2023-09-01 01:37:10,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630659666] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:37:10,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:37:10,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:37:10,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020546623] [2023-09-01 01:37:10,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:37:10,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:37:10,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:37:10,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:37:10,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-09-01 01:37:10,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 62 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 316.2857142857143) internal successors, (4428), 14 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:10,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:10,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-09-01 01:37:10,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:17,270 INFO L130 PetriNetUnfolder]: 30459/45082 cut-off events. [2023-09-01 01:37:17,270 INFO L131 PetriNetUnfolder]: For 80324/80324 co-relation queries the response was YES. [2023-09-01 01:37:17,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138687 conditions, 45082 events. 30459/45082 cut-off events. For 80324/80324 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 299892 event pairs, 753 based on Foata normal form. 1124/46206 useless extension candidates. Maximal degree in co-relation 138659. Up to 7604 conditions per place. [2023-09-01 01:37:17,610 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 235 selfloop transitions, 6 changer transitions 0/241 dead transitions. [2023-09-01 01:37:17,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 241 transitions, 1781 flow [2023-09-01 01:37:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:37:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:37:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2666 transitions. [2023-09-01 01:37:17,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-09-01 01:37:17,613 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2666 transitions. [2023-09-01 01:37:17,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2666 transitions. [2023-09-01 01:37:17,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:17,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2666 transitions. [2023-09-01 01:37:17,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 333.25) internal successors, (2666), 8 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:17,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:17,617 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:17,618 INFO L175 Difference]: Start difference. First operand has 104 places, 62 transitions, 386 flow. Second operand 8 states and 2666 transitions. [2023-09-01 01:37:17,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 241 transitions, 1781 flow [2023-09-01 01:37:17,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 241 transitions, 1665 flow, removed 14 selfloop flow, removed 13 redundant places. [2023-09-01 01:37:17,858 INFO L231 Difference]: Finished difference. Result has 96 places, 59 transitions, 336 flow [2023-09-01 01:37:17,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=89, 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=96, PETRI_TRANSITIONS=59} [2023-09-01 01:37:17,859 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2023-09-01 01:37:17,859 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 59 transitions, 336 flow [2023-09-01 01:37:17,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 316.2857142857143) internal successors, (4428), 14 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:17,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:17,860 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:17,876 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 (36)] Ended with exit code 0 [2023-09-01 01:37:18,075 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 [2023-09-01 01:37:18,076 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:18,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:18,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1181695946, now seen corresponding path program 3 times [2023-09-01 01:37:18,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:18,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452688967] [2023-09-01 01:37:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:37:18,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:18,078 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) [2023-09-01 01:37:18,080 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 [2023-09-01 01:37:19,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:37:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:19,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:37:19,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:19,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:37:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:19,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:19,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452688967] [2023-09-01 01:37:19,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452688967] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:37:19,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:37:19,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:37:19,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338796513] [2023-09-01 01:37:19,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:37:19,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:37:19,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:37:19,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:37:19,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-09-01 01:37:19,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 59 transitions, 336 flow. Second operand has 14 states, 14 states have (on average 316.42857142857144) internal successors, (4430), 14 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:19,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:19,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-09-01 01:37:19,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:25,346 INFO L130 PetriNetUnfolder]: 26843/40146 cut-off events. [2023-09-01 01:37:25,346 INFO L131 PetriNetUnfolder]: For 37509/37509 co-relation queries the response was YES. [2023-09-01 01:37:25,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113805 conditions, 40146 events. 26843/40146 cut-off events. For 37509/37509 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 265323 event pairs, 853 based on Foata normal form. 1320/41466 useless extension candidates. Maximal degree in co-relation 113783. Up to 6786 conditions per place. [2023-09-01 01:37:25,767 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 204 selfloop transitions, 6 changer transitions 0/210 dead transitions. [2023-09-01 01:37:25,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 210 transitions, 1368 flow [2023-09-01 01:37:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:37:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:37:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2649 transitions. [2023-09-01 01:37:25,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44506048387096775 [2023-09-01 01:37:25,771 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2649 transitions. [2023-09-01 01:37:25,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2649 transitions. [2023-09-01 01:37:25,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:25,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2649 transitions. [2023-09-01 01:37:25,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 331.125) internal successors, (2649), 8 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:25,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:25,784 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:25,784 INFO L175 Difference]: Start difference. First operand has 96 places, 59 transitions, 336 flow. Second operand 8 states and 2649 transitions. [2023-09-01 01:37:25,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 210 transitions, 1368 flow [2023-09-01 01:37:26,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 210 transitions, 1276 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 01:37:26,097 INFO L231 Difference]: Finished difference. Result has 89 places, 56 transitions, 292 flow [2023-09-01 01:37:26,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=82, 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=89, PETRI_TRANSITIONS=56} [2023-09-01 01:37:26,098 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-09-01 01:37:26,098 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 56 transitions, 292 flow [2023-09-01 01:37:26,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 316.42857142857144) internal successors, (4430), 14 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:26,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:26,098 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] [2023-09-01 01:37:26,116 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 [2023-09-01 01:37:26,314 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 [2023-09-01 01:37:26,314 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:26,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:26,315 INFO L85 PathProgramCache]: Analyzing trace with hash 573746028, now seen corresponding path program 1 times [2023-09-01 01:37:26,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:26,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935186326] [2023-09-01 01:37:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:37:26,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:26,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:26,316 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) [2023-09-01 01:37:26,318 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 [2023-09-01 01:37:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:37:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:37:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:26,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:26,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:26,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935186326] [2023-09-01 01:37:26,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935186326] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:26,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:26,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:37:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775346645] [2023-09-01 01:37:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:26,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:37:26,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:37:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:37:26,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 744 [2023-09-01 01:37:26,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 56 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:26,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:26,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 744 [2023-09-01 01:37:26,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:31,569 INFO L130 PetriNetUnfolder]: 26789/40092 cut-off events. [2023-09-01 01:37:31,569 INFO L131 PetriNetUnfolder]: For 29367/29367 co-relation queries the response was YES. [2023-09-01 01:37:31,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110285 conditions, 40092 events. 26789/40092 cut-off events. For 29367/29367 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 268881 event pairs, 22285 based on Foata normal form. 54/40146 useless extension candidates. Maximal degree in co-relation 110268. Up to 33375 conditions per place. [2023-09-01 01:37:32,087 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 100 selfloop transitions, 3 changer transitions 2/105 dead transitions. [2023-09-01 01:37:32,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 105 transitions, 705 flow [2023-09-01 01:37:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:37:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:37:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1311 transitions. [2023-09-01 01:37:32,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405241935483871 [2023-09-01 01:37:32,089 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1311 transitions. [2023-09-01 01:37:32,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1311 transitions. [2023-09-01 01:37:32,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:32,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1311 transitions. [2023-09-01 01:37:32,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 327.75) internal successors, (1311), 4 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:32,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:32,092 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:32,092 INFO L175 Difference]: Start difference. First operand has 89 places, 56 transitions, 292 flow. Second operand 4 states and 1311 transitions. [2023-09-01 01:37:32,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 105 transitions, 705 flow [2023-09-01 01:37:32,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 105 transitions, 674 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:37:32,155 INFO L231 Difference]: Finished difference. Result has 88 places, 57 transitions, 297 flow [2023-09-01 01:37:32,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=83, 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=88, PETRI_TRANSITIONS=57} [2023-09-01 01:37:32,156 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2023-09-01 01:37:32,156 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 57 transitions, 297 flow [2023-09-01 01:37:32,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:32,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:32,156 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] [2023-09-01 01:37:32,169 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 [2023-09-01 01:37:32,366 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 [2023-09-01 01:37:32,367 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:32,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash 867227724, now seen corresponding path program 2 times [2023-09-01 01:37:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:32,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002628258] [2023-09-01 01:37:32,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:37:32,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:32,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:32,369 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) [2023-09-01 01:37:32,376 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 [2023-09-01 01:37:32,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:37:32,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:37:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:32,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:32,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:32,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002628258] [2023-09-01 01:37:32,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002628258] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:32,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:32,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:37:32,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207301587] [2023-09-01 01:37:32,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:32,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:37:32,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:32,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:37:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:37:32,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-09-01 01:37:32,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 309.1666666666667) internal successors, (1855), 6 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:32,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:32,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-09-01 01:37:32,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:37,745 INFO L130 PetriNetUnfolder]: 26881/40310 cut-off events. [2023-09-01 01:37:37,745 INFO L131 PetriNetUnfolder]: For 29875/29875 co-relation queries the response was YES. [2023-09-01 01:37:37,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113255 conditions, 40310 events. 26881/40310 cut-off events. For 29875/29875 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 270726 event pairs, 20573 based on Foata normal form. 66/40376 useless extension candidates. Maximal degree in co-relation 113236. Up to 30889 conditions per place. [2023-09-01 01:37:38,012 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 147 selfloop transitions, 14 changer transitions 20/181 dead transitions. [2023-09-01 01:37:38,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 181 transitions, 1224 flow [2023-09-01 01:37:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:37:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:37:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2552 transitions. [2023-09-01 01:37:38,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-09-01 01:37:38,015 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2552 transitions. [2023-09-01 01:37:38,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2552 transitions. [2023-09-01 01:37:38,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:38,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2552 transitions. [2023-09-01 01:37:38,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 319.0) internal successors, (2552), 8 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:38,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:38,020 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:38,020 INFO L175 Difference]: Start difference. First operand has 88 places, 57 transitions, 297 flow. Second operand 8 states and 2552 transitions. [2023-09-01 01:37:38,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 181 transitions, 1224 flow [2023-09-01 01:37:38,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 181 transitions, 1196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:37:38,065 INFO L231 Difference]: Finished difference. Result has 98 places, 67 transitions, 386 flow [2023-09-01 01:37:38,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=98, PETRI_TRANSITIONS=67} [2023-09-01 01:37:38,066 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-09-01 01:37:38,066 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 67 transitions, 386 flow [2023-09-01 01:37:38,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 309.1666666666667) internal successors, (1855), 6 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:38,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:38,067 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] [2023-09-01 01:37:38,076 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 [2023-09-01 01:37:38,267 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 [2023-09-01 01:37:38,268 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:38,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:38,269 INFO L85 PathProgramCache]: Analyzing trace with hash 311245542, now seen corresponding path program 3 times [2023-09-01 01:37:38,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:38,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689703913] [2023-09-01 01:37:38,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:37:38,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:38,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:38,270 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) [2023-09-01 01:37:38,272 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 [2023-09-01 01:37:38,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 01:37:38,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:38,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:37:38,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:38,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:38,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689703913] [2023-09-01 01:37:38,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689703913] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:38,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:38,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:37:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932540772] [2023-09-01 01:37:38,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:38,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:37:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:37:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:37:38,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 744 [2023-09-01 01:37:38,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 67 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 317.25) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:38,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:38,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 744 [2023-09-01 01:37:38,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:43,611 INFO L130 PetriNetUnfolder]: 26729/39996 cut-off events. [2023-09-01 01:37:43,611 INFO L131 PetriNetUnfolder]: For 63336/63336 co-relation queries the response was YES. [2023-09-01 01:37:43,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140274 conditions, 39996 events. 26729/39996 cut-off events. For 63336/63336 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 265545 event pairs, 22561 based on Foata normal form. 36/40032 useless extension candidates. Maximal degree in co-relation 140250. Up to 34077 conditions per place. [2023-09-01 01:37:44,044 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 81 selfloop transitions, 5 changer transitions 7/93 dead transitions. [2023-09-01 01:37:44,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 708 flow [2023-09-01 01:37:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:37:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:37:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-09-01 01:37:44,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390681003584229 [2023-09-01 01:37:44,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-09-01 01:37:44,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-09-01 01:37:44,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:44,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-09-01 01:37:44,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:44,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:44,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:44,048 INFO L175 Difference]: Start difference. First operand has 98 places, 67 transitions, 386 flow. Second operand 3 states and 980 transitions. [2023-09-01 01:37:44,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 708 flow [2023-09-01 01:37:44,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 93 transitions, 689 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 01:37:44,246 INFO L231 Difference]: Finished difference. Result has 97 places, 64 transitions, 370 flow [2023-09-01 01:37:44,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=97, PETRI_TRANSITIONS=64} [2023-09-01 01:37:44,247 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-09-01 01:37:44,247 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 64 transitions, 370 flow [2023-09-01 01:37:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.25) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:44,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:44,247 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] [2023-09-01 01:37:44,255 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 [2023-09-01 01:37:44,455 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 [2023-09-01 01:37:44,456 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:44,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash -372820549, now seen corresponding path program 1 times [2023-09-01 01:37:44,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:44,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247409609] [2023-09-01 01:37:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:37:44,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:44,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:44,458 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) [2023-09-01 01:37:44,460 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 [2023-09-01 01:37:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:37:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:37:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:44,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:44,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247409609] [2023-09-01 01:37:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247409609] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:44,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:44,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:37:44,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528047873] [2023-09-01 01:37:44,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:37:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:37:44,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:37:44,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 744 [2023-09-01 01:37:44,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 64 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:44,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:44,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 744 [2023-09-01 01:37:44,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:50,075 INFO L130 PetriNetUnfolder]: 25719/38456 cut-off events. [2023-09-01 01:37:50,075 INFO L131 PetriNetUnfolder]: For 70111/70111 co-relation queries the response was YES. [2023-09-01 01:37:50,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135212 conditions, 38456 events. 25719/38456 cut-off events. For 70111/70111 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 254933 event pairs, 20359 based on Foata normal form. 442/38898 useless extension candidates. Maximal degree in co-relation 135187. Up to 30791 conditions per place. [2023-09-01 01:37:50,416 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 123 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2023-09-01 01:37:50,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 128 transitions, 973 flow [2023-09-01 01:37:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:37:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:37:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1305 transitions. [2023-09-01 01:37:50,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43850806451612906 [2023-09-01 01:37:50,428 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1305 transitions. [2023-09-01 01:37:50,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1305 transitions. [2023-09-01 01:37:50,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:50,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1305 transitions. [2023-09-01 01:37:50,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.25) internal successors, (1305), 4 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:50,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:50,431 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:50,431 INFO L175 Difference]: Start difference. First operand has 97 places, 64 transitions, 370 flow. Second operand 4 states and 1305 transitions. [2023-09-01 01:37:50,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 128 transitions, 973 flow [2023-09-01 01:37:50,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 924 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 01:37:50,655 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 404 flow [2023-09-01 01:37:50,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=99, PETRI_TRANSITIONS=67} [2023-09-01 01:37:50,656 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-09-01 01:37:50,656 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 404 flow [2023-09-01 01:37:50,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:50,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:50,657 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] [2023-09-01 01:37:50,667 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 (41)] Ended with exit code 0 [2023-09-01 01:37:50,866 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 [2023-09-01 01:37:50,867 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:50,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:50,867 INFO L85 PathProgramCache]: Analyzing trace with hash 720234385, now seen corresponding path program 2 times [2023-09-01 01:37:50,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:50,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866379278] [2023-09-01 01:37:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:37:50,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:50,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:50,869 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) [2023-09-01 01:37:50,871 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 [2023-09-01 01:37:51,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:37:51,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:51,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:37:51,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:51,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:51,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:51,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866379278] [2023-09-01 01:37:51,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866379278] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:51,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:51,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:37:51,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211808326] [2023-09-01 01:37:51,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:51,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:37:51,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:37:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:37:51,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 744 [2023-09-01 01:37:51,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 67 transitions, 404 flow. Second operand has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:51,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:51,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 744 [2023-09-01 01:37:51,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:56,191 INFO L130 PetriNetUnfolder]: 24833/36958 cut-off events. [2023-09-01 01:37:56,191 INFO L131 PetriNetUnfolder]: For 68783/68783 co-relation queries the response was YES. [2023-09-01 01:37:56,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133183 conditions, 36958 events. 24833/36958 cut-off events. For 68783/68783 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 246183 event pairs, 1455 based on Foata normal form. 442/37400 useless extension candidates. Maximal degree in co-relation 133157. Up to 32584 conditions per place. [2023-09-01 01:37:56,434 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 105 selfloop transitions, 8 changer transitions 1/114 dead transitions. [2023-09-01 01:37:56,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 114 transitions, 872 flow [2023-09-01 01:37:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:37:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:37:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2023-09-01 01:37:56,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361559139784946 [2023-09-01 01:37:56,436 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2023-09-01 01:37:56,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2023-09-01 01:37:56,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:56,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2023-09-01 01:37:56,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:56,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:56,439 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:56,439 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 404 flow. Second operand 4 states and 1298 transitions. [2023-09-01 01:37:56,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 114 transitions, 872 flow [2023-09-01 01:37:56,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 114 transitions, 859 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 01:37:56,629 INFO L231 Difference]: Finished difference. Result has 103 places, 68 transitions, 434 flow [2023-09-01 01:37:56,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=434, PETRI_PLACES=103, PETRI_TRANSITIONS=68} [2023-09-01 01:37:56,629 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 38 predicate places. [2023-09-01 01:37:56,629 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 68 transitions, 434 flow [2023-09-01 01:37:56,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:56,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:56,630 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, 1] [2023-09-01 01:37:56,643 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 [2023-09-01 01:37:56,844 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 [2023-09-01 01:37:56,844 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:56,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:56,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1444990752, now seen corresponding path program 1 times [2023-09-01 01:37:56,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:56,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565889061] [2023-09-01 01:37:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:37:56,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:56,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:56,846 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) [2023-09-01 01:37:56,848 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 [2023-09-01 01:37:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:37:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:37:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 01:37:57,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:37:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 01:37:57,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:57,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565889061] [2023-09-01 01:37:57,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565889061] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:37:57,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:37:57,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-09-01 01:37:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752651645] [2023-09-01 01:37:57,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:57,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:37:57,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:57,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:37:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 01:37:57,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-09-01 01:37:57,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 68 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:57,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:57,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-09-01 01:37:57,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:02,517 INFO L130 PetriNetUnfolder]: 25855/38408 cut-off events. [2023-09-01 01:38:02,517 INFO L131 PetriNetUnfolder]: For 81533/81533 co-relation queries the response was YES. [2023-09-01 01:38:02,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139016 conditions, 38408 events. 25855/38408 cut-off events. For 81533/81533 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 250917 event pairs, 2166 based on Foata normal form. 480/38888 useless extension candidates. Maximal degree in co-relation 138988. Up to 21388 conditions per place. [2023-09-01 01:38:02,774 INFO L137 encePairwiseOnDemand]: 736/744 looper letters, 139 selfloop transitions, 34 changer transitions 1/174 dead transitions. [2023-09-01 01:38:02,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 1425 flow [2023-09-01 01:38:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:38:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:38:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2235 transitions. [2023-09-01 01:38:02,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42914746543778803 [2023-09-01 01:38:02,777 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2235 transitions. [2023-09-01 01:38:02,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2235 transitions. [2023-09-01 01:38:02,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:02,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2235 transitions. [2023-09-01 01:38:02,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.2857142857143) internal successors, (2235), 7 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:02,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:02,781 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:02,781 INFO L175 Difference]: Start difference. First operand has 103 places, 68 transitions, 434 flow. Second operand 7 states and 2235 transitions. [2023-09-01 01:38:02,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 1425 flow [2023-09-01 01:38:03,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 174 transitions, 1369 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-09-01 01:38:03,107 INFO L231 Difference]: Finished difference. Result has 106 places, 88 transitions, 641 flow [2023-09-01 01:38:03,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=641, PETRI_PLACES=106, PETRI_TRANSITIONS=88} [2023-09-01 01:38:03,111 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-09-01 01:38:03,111 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 88 transitions, 641 flow [2023-09-01 01:38:03,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:03,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:03,111 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, 1] [2023-09-01 01:38:03,121 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 (43)] Ended with exit code 0 [2023-09-01 01:38:03,321 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 [2023-09-01 01:38:03,321 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:03,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:03,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1368699330, now seen corresponding path program 2 times [2023-09-01 01:38:03,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:03,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823468427] [2023-09-01 01:38:03,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:38:03,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:03,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:03,324 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) [2023-09-01 01:38:03,327 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 [2023-09-01 01:38:03,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:38:03,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:38:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:38:03,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:38:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:38:03,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:03,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823468427] [2023-09-01 01:38:03,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823468427] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:38:03,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:38:03,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-09-01 01:38:03,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287779376] [2023-09-01 01:38:03,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:03,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:38:03,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:38:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:38:03,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-09-01 01:38:03,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 88 transitions, 641 flow. Second operand has 6 states, 6 states have (on average 309.6666666666667) internal successors, (1858), 6 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:03,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:03,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-09-01 01:38:03,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:09,718 INFO L130 PetriNetUnfolder]: 29037/43411 cut-off events. [2023-09-01 01:38:09,718 INFO L131 PetriNetUnfolder]: For 126690/126690 co-relation queries the response was YES. [2023-09-01 01:38:09,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171156 conditions, 43411 events. 29037/43411 cut-off events. For 126690/126690 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 289094 event pairs, 4011 based on Foata normal form. 25/43436 useless extension candidates. Maximal degree in co-relation 171128. Up to 21361 conditions per place. [2023-09-01 01:38:10,091 INFO L137 encePairwiseOnDemand]: 736/744 looper letters, 147 selfloop transitions, 36 changer transitions 23/206 dead transitions. [2023-09-01 01:38:10,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 206 transitions, 1657 flow [2023-09-01 01:38:10,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:38:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:38:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2238 transitions. [2023-09-01 01:38:10,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42972350230414746 [2023-09-01 01:38:10,094 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2238 transitions. [2023-09-01 01:38:10,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2238 transitions. [2023-09-01 01:38:10,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:10,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2238 transitions. [2023-09-01 01:38:10,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.7142857142857) internal successors, (2238), 7 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:10,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:10,098 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:10,098 INFO L175 Difference]: Start difference. First operand has 106 places, 88 transitions, 641 flow. Second operand 7 states and 2238 transitions. [2023-09-01 01:38:10,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 206 transitions, 1657 flow [2023-09-01 01:38:11,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 206 transitions, 1655 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 01:38:11,427 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 802 flow [2023-09-01 01:38:11,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2023-09-01 01:38:11,428 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 50 predicate places. [2023-09-01 01:38:11,428 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 802 flow [2023-09-01 01:38:11,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 309.6666666666667) internal successors, (1858), 6 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:11,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:11,429 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, 1] [2023-09-01 01:38:11,439 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 [2023-09-01 01:38:11,638 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 [2023-09-01 01:38:11,639 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:11,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1489888356, now seen corresponding path program 3 times [2023-09-01 01:38:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:11,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633004003] [2023-09-01 01:38:11,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:38:11,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:11,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:11,642 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) [2023-09-01 01:38:11,643 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 [2023-09-01 01:38:12,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:38:12,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:12,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 01:38:12,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:38:12,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:12,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633004003] [2023-09-01 01:38:12,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633004003] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:38:12,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:38:12,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:38:12,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531590605] [2023-09-01 01:38:12,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:12,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:12,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:12,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:38:12,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 744 [2023-09-01 01:38:12,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 802 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:12,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:12,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 744 [2023-09-01 01:38:12,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:17,710 INFO L130 PetriNetUnfolder]: 27228/40415 cut-off events. [2023-09-01 01:38:17,711 INFO L131 PetriNetUnfolder]: For 148128/148128 co-relation queries the response was YES. [2023-09-01 01:38:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171691 conditions, 40415 events. 27228/40415 cut-off events. For 148128/148128 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 261926 event pairs, 17213 based on Foata normal form. 58/40473 useless extension candidates. Maximal degree in co-relation 171659. Up to 30737 conditions per place. [2023-09-01 01:38:18,054 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 121 selfloop transitions, 14 changer transitions 17/152 dead transitions. [2023-09-01 01:38:18,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 152 transitions, 1410 flow [2023-09-01 01:38:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:38:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:38:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1610 transitions. [2023-09-01 01:38:18,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327956989247312 [2023-09-01 01:38:18,056 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1610 transitions. [2023-09-01 01:38:18,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1610 transitions. [2023-09-01 01:38:18,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:18,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1610 transitions. [2023-09-01 01:38:18,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 322.0) internal successors, (1610), 5 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:18,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:18,059 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:18,060 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 802 flow. Second operand 5 states and 1610 transitions. [2023-09-01 01:38:18,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 152 transitions, 1410 flow [2023-09-01 01:38:19,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 152 transitions, 1389 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-09-01 01:38:19,402 INFO L231 Difference]: Finished difference. Result has 117 places, 96 transitions, 829 flow [2023-09-01 01:38:19,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=829, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2023-09-01 01:38:19,403 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 52 predicate places. [2023-09-01 01:38:19,403 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 829 flow [2023-09-01 01:38:19,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:19,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:19,403 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, 1] [2023-09-01 01:38:19,417 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 [2023-09-01 01:38:19,612 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 [2023-09-01 01:38:19,612 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:19,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:19,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1982014636, now seen corresponding path program 4 times [2023-09-01 01:38:19,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:19,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944287730] [2023-09-01 01:38:19,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:38:19,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:19,614 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) [2023-09-01 01:38:19,616 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 [2023-09-01 01:38:20,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:38:20,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 01:38:20,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:38:20,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:20,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944287730] [2023-09-01 01:38:20,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944287730] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:38:20,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:38:20,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:38:20,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313465765] [2023-09-01 01:38:20,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:20,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:20,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:20,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:20,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:38:20,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-09-01 01:38:20,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 96 transitions, 829 flow. Second operand has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:20,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:20,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-09-01 01:38:20,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:26,039 INFO L130 PetriNetUnfolder]: 27765/41374 cut-off events. [2023-09-01 01:38:26,040 INFO L131 PetriNetUnfolder]: For 155382/155382 co-relation queries the response was YES. [2023-09-01 01:38:26,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177375 conditions, 41374 events. 27765/41374 cut-off events. For 155382/155382 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 271675 event pairs, 18715 based on Foata normal form. 480/41854 useless extension candidates. Maximal degree in co-relation 177342. Up to 34131 conditions per place. [2023-09-01 01:38:26,588 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 151 selfloop transitions, 16 changer transitions 1/168 dead transitions. [2023-09-01 01:38:26,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 168 transitions, 1564 flow [2023-09-01 01:38:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:38:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:38:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1923 transitions. [2023-09-01 01:38:26,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307795698924731 [2023-09-01 01:38:26,601 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1923 transitions. [2023-09-01 01:38:26,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1923 transitions. [2023-09-01 01:38:26,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:26,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1923 transitions. [2023-09-01 01:38:26,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:26,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:26,604 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:26,605 INFO L175 Difference]: Start difference. First operand has 117 places, 96 transitions, 829 flow. Second operand 6 states and 1923 transitions. [2023-09-01 01:38:26,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 168 transitions, 1564 flow [2023-09-01 01:38:27,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 168 transitions, 1551 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 01:38:27,975 INFO L231 Difference]: Finished difference. Result has 121 places, 96 transitions, 860 flow [2023-09-01 01:38:27,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=121, PETRI_TRANSITIONS=96} [2023-09-01 01:38:27,976 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 56 predicate places. [2023-09-01 01:38:27,976 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 96 transitions, 860 flow [2023-09-01 01:38:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:27,976 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, 1] [2023-09-01 01:38:27,987 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 (46)] Ended with exit code 0 [2023-09-01 01:38:28,186 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 [2023-09-01 01:38:28,187 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:28,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash -623649896, now seen corresponding path program 5 times [2023-09-01 01:38:28,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:28,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812030649] [2023-09-01 01:38:28,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:38:28,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:28,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:28,189 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) [2023-09-01 01:38:28,191 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 [2023-09-01 01:38:28,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 01:38:28,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:28,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:28,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 01:38:28,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:38:28,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812030649] [2023-09-01 01:38:28,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812030649] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:38:28,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:38:28,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:38:28,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876475520] [2023-09-01 01:38:28,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:28,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:28,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:38:28,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 744 [2023-09-01 01:38:28,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 96 transitions, 860 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:28,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:28,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 744 [2023-09-01 01:38:28,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:34,688 INFO L130 PetriNetUnfolder]: 26876/39759 cut-off events. [2023-09-01 01:38:34,688 INFO L131 PetriNetUnfolder]: For 158040/158040 co-relation queries the response was YES. [2023-09-01 01:38:34,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173819 conditions, 39759 events. 26876/39759 cut-off events. For 158040/158040 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 254956 event pairs, 19364 based on Foata normal form. 58/39817 useless extension candidates. Maximal degree in co-relation 173785. Up to 36636 conditions per place. [2023-09-01 01:38:35,063 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 113 selfloop transitions, 13 changer transitions 17/143 dead transitions. [2023-09-01 01:38:35,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 143 transitions, 1405 flow [2023-09-01 01:38:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:38:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:38:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1605 transitions. [2023-09-01 01:38:35,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-09-01 01:38:35,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1605 transitions. [2023-09-01 01:38:35,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1605 transitions. [2023-09-01 01:38:35,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:35,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1605 transitions. [2023-09-01 01:38:35,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:35,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:35,068 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:35,068 INFO L175 Difference]: Start difference. First operand has 121 places, 96 transitions, 860 flow. Second operand 5 states and 1605 transitions. [2023-09-01 01:38:35,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 143 transitions, 1405 flow [2023-09-01 01:38:36,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 143 transitions, 1320 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-09-01 01:38:36,605 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 783 flow [2023-09-01 01:38:36,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=783, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-09-01 01:38:36,605 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 53 predicate places. [2023-09-01 01:38:36,605 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 783 flow [2023-09-01 01:38:36,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:36,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:36,606 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, 1, 1, 1] [2023-09-01 01:38:36,617 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 (47)] Ended with exit code 0 [2023-09-01 01:38:36,817 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 [2023-09-01 01:38:36,817 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:36,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:36,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1834518372, now seen corresponding path program 1 times [2023-09-01 01:38:36,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:36,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650524652] [2023-09-01 01:38:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:38:36,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:36,819 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) [2023-09-01 01:38:36,821 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 [2023-09-01 01:38:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:38:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 01:38:37,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:37,678 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 60 treesize of output 58 [2023-09-01 01:38:37,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-09-01 01:38:39,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:38:39,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 646 treesize of output 438 [2023-09-01 01:39:10,663 WARN L222 SmtUtils]: Spent 28.57s on a formula simplification. DAG size of input: 124 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:39:20,631 WARN L222 SmtUtils]: Spent 8.58s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:39:30,825 WARN L222 SmtUtils]: Spent 8.51s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:39:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:39:33,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:40:31,868 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse50 (bvmul (_ bv4 32) |c_thread1Thread1of1ForFork1_~i~0#1|))) (let ((.cse5 (bvadd (_ bv3 32) c_~o_0~0.offset)) (.cse6 (bvadd (_ bv2 32) c_~o_0~0.offset)) (.cse7 (bvadd (_ bv1 32) c_~o_0~0.offset)) (.cse10 (bvadd (_ bv3 32) c_~o_2~0.offset)) (.cse11 (bvadd (_ bv2 32) c_~o_2~0.offset)) (.cse12 (bvadd c_~o_2~0.offset (_ bv1 32))) (.cse14 (bvadd (_ bv3 32) c_~o_4~0.offset)) (.cse15 (bvadd (_ bv2 32) c_~o_4~0.offset)) (.cse16 (bvadd c_~o_4~0.offset (_ bv1 32))) (.cse18 ((_ sign_extend 32) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse19 (bvadd .cse50 (_ bv3 32) c_~o_2~0.offset)) (.cse20 (bvadd .cse50 (_ bv2 32) c_~o_2~0.offset)) (.cse21 (bvadd .cse50 c_~o_2~0.offset (_ bv1 32))) (.cse22 (bvadd .cse50 c_~o_2~0.offset))) (and (forall ((~o_2~0.base (_ BitVec 32)) (v_ArrVal_4595 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_4595))) (let ((.cse9 (select .cse8 ~o_2~0.base))) (let ((.cse17 (concat (concat (concat (select .cse9 .cse19) (select .cse9 .cse20)) (select .cse9 .cse21)) (select .cse9 .cse22)))) (or (forall ((~o_4~0.base (_ BitVec 32))) (let ((.cse1 (let ((.cse13 (select .cse8 ~o_4~0.base))) (concat (concat (concat (select .cse13 .cse14) (select .cse13 .cse15)) (select .cse13 .cse16)) (select .cse13 c_~o_4~0.offset))))) (let ((.cse3 (bvneg .cse1))) (let ((.cse2 (concat (concat (concat (select .cse9 .cse10) (select .cse9 .cse11)) (select .cse9 .cse12)) (select .cse9 c_~o_2~0.offset))) (.cse0 (bvadd .cse3 (let ((.cse4 (select .cse8 c_~o_0~0.base))) (concat (concat (concat (select .cse4 .cse5) (select .cse4 .cse6)) (select .cse4 .cse7)) (select .cse4 c_~o_0~0.offset)))))) (or (= .cse0 (_ bv0 32)) (not (bvsge .cse1 (_ bv0 32))) (not (bvsgt (bvadd .cse2 .cse3) (_ bv0 32))) (not (bvsge ((_ sign_extend 32) .cse2) (bvadd (_ bv18446744071562067968 64) ((_ sign_extend 32) .cse1)))) (not (bvsle .cse0 (_ bv0 32)))))))) (not (bvsge .cse17 (_ bv0 32))) (not (bvsge .cse18 (bvadd (_ bv18446744071562067968 64) ((_ sign_extend 32) .cse17)))) (not (bvsgt (bvadd |c_thread1Thread1of1ForFork1_#t~mem1#1| (bvneg .cse17)) (_ bv0 32)))))))) (forall ((~o_2~0.base (_ BitVec 32)) (v_ArrVal_4595 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse30 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_4595))) (let ((.cse25 (select .cse30 ~o_2~0.base))) (let ((.cse23 (concat (concat (concat (select .cse25 .cse19) (select .cse25 .cse20)) (select .cse25 .cse21)) (select .cse25 .cse22)))) (or (not (bvsge .cse23 (_ bv0 32))) (forall ((~o_4~0.base (_ BitVec 32))) (let ((.cse28 (let ((.cse31 (select .cse30 ~o_4~0.base))) (concat (concat (concat (select .cse31 .cse14) (select .cse31 .cse15)) (select .cse31 .cse16)) (select .cse31 c_~o_4~0.offset))))) (let ((.cse26 (bvneg .cse28)) (.cse27 (let ((.cse29 (select .cse30 c_~o_0~0.base))) (concat (concat (concat (select .cse29 .cse5) (select .cse29 .cse6)) (select .cse29 .cse7)) (select .cse29 c_~o_0~0.offset))))) (let ((.cse24 (bvadd .cse26 .cse27))) (or (= .cse24 (_ bv0 32)) (not (bvsgt (bvadd (concat (concat (concat (select .cse25 .cse10) (select .cse25 .cse11)) (select .cse25 .cse12)) (select .cse25 c_~o_2~0.offset)) .cse26) (_ bv0 32))) (not (bvsle .cse27 (bvadd (_ bv2147483647 32) .cse28))) (not (bvsle .cse24 (_ bv0 32)))))))) (not (bvsge .cse18 (bvadd (_ bv18446744071562067968 64) ((_ sign_extend 32) .cse23)))) (not (bvsgt (bvadd |c_thread1Thread1of1ForFork1_#t~mem1#1| (bvneg .cse23)) (_ bv0 32)))))))) (forall ((~o_2~0.base (_ BitVec 32)) (v_ArrVal_4595 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse39 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_4595))) (let ((.cse34 (select .cse39 ~o_2~0.base))) (let ((.cse32 (concat (concat (concat (select .cse34 .cse19) (select .cse34 .cse20)) (select .cse34 .cse21)) (select .cse34 .cse22)))) (or (not (bvsle |c_thread1Thread1of1ForFork1_#t~mem1#1| (bvadd (_ bv2147483647 32) .cse32))) (forall ((~o_4~0.base (_ BitVec 32))) (let ((.cse37 (let ((.cse40 (select .cse39 ~o_4~0.base))) (concat (concat (concat (select .cse40 .cse14) (select .cse40 .cse15)) (select .cse40 .cse16)) (select .cse40 c_~o_4~0.offset))))) (let ((.cse35 (bvneg .cse37)) (.cse36 (let ((.cse38 (select .cse39 c_~o_0~0.base))) (concat (concat (concat (select .cse38 .cse5) (select .cse38 .cse6)) (select .cse38 .cse7)) (select .cse38 c_~o_0~0.offset))))) (let ((.cse33 (bvadd .cse35 .cse36))) (or (= .cse33 (_ bv0 32)) (not (bvsgt (bvadd (concat (concat (concat (select .cse34 .cse10) (select .cse34 .cse11)) (select .cse34 .cse12)) (select .cse34 c_~o_2~0.offset)) .cse35) (_ bv0 32))) (not (bvsle .cse36 (bvadd (_ bv2147483647 32) .cse37))) (not (bvsle .cse33 (_ bv0 32)))))))) (not (bvsge .cse18 (bvadd (_ bv18446744071562067968 64) ((_ sign_extend 32) .cse32)))) (not (bvsgt (bvadd |c_thread1Thread1of1ForFork1_#t~mem1#1| (bvneg .cse32)) (_ bv0 32)))))))) (forall ((~o_2~0.base (_ BitVec 32)) (v_ArrVal_4595 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse46 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_4595))) (let ((.cse47 (select .cse46 ~o_2~0.base))) (let ((.cse49 (concat (concat (concat (select .cse47 .cse19) (select .cse47 .cse20)) (select .cse47 .cse21)) (select .cse47 .cse22)))) (or (forall ((~o_4~0.base (_ BitVec 32))) (let ((.cse42 (let ((.cse48 (select .cse46 ~o_4~0.base))) (concat (concat (concat (select .cse48 .cse14) (select .cse48 .cse15)) (select .cse48 .cse16)) (select .cse48 c_~o_4~0.offset))))) (let ((.cse44 (bvneg .cse42))) (let ((.cse43 (concat (concat (concat (select .cse47 .cse10) (select .cse47 .cse11)) (select .cse47 .cse12)) (select .cse47 c_~o_2~0.offset))) (.cse41 (bvadd .cse44 (let ((.cse45 (select .cse46 c_~o_0~0.base))) (concat (concat (concat (select .cse45 .cse5) (select .cse45 .cse6)) (select .cse45 .cse7)) (select .cse45 c_~o_0~0.offset)))))) (or (= .cse41 (_ bv0 32)) (not (bvsge .cse42 (_ bv0 32))) (not (bvsgt (bvadd .cse43 .cse44) (_ bv0 32))) (not (bvsge ((_ sign_extend 32) .cse43) (bvadd (_ bv18446744071562067968 64) ((_ sign_extend 32) .cse42)))) (not (bvsle .cse41 (_ bv0 32)))))))) (not (bvsle |c_thread1Thread1of1ForFork1_#t~mem1#1| (bvadd (_ bv2147483647 32) .cse49))) (not (bvsge .cse18 (bvadd (_ bv18446744071562067968 64) ((_ sign_extend 32) .cse49)))) (not (bvsgt (bvadd |c_thread1Thread1of1ForFork1_#t~mem1#1| (bvneg .cse49)) (_ bv0 32))))))))))) is different from false [2023-09-01 01:44:11,351 WARN L222 SmtUtils]: Spent 3.65m on a formula simplification. DAG size of input: 593 DAG size of output: 512 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 01:44:11,354 INFO L321 Elim1Store]: treesize reduction 264, result has 87.9 percent of original size [2023-09-01 01:44:11,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 1532 treesize of output 2777 [2023-09-01 01:44:11,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:11,713 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:11,850 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:11,862 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:11,941 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:11,952 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:11,965 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:12,043 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:12,056 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:12,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:12,344 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 01:44:12,546 INFO L217 Elim1Store]: Index analysis took 997 ms [2023-09-01 01:44:18,522 WARN L222 SmtUtils]: Spent 5.97s on a formula simplification that was a NOOP. DAG size: 328 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 01:44:18,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:44:18,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 84 case distinctions, treesize of input 865 treesize of output 1476 Killed by 15