./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-mts.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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:33:24,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:33:24,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:33:24,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:33:24,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:33:24,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:33:24,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:33:24,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:33:24,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:33:24,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:33:24,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:33:24,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:33:24,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:33:24,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:33:24,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:33:24,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:33:24,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:33:24,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:33:24,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:33:24,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:33:24,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:33:24,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:33:24,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:33:24,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:33:24,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:33:24,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:33:24,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:33:24,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:33:24,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:33:24,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:33:24,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:33:24,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:33:24,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:33:24,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:33:24,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:33:24,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:33:24,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:33:24,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:33:24,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:33:24,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:33:24,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:33:24,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:33:24,881 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:33:24,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:33:24,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:33:24,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:33:24,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:33:24,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:33:24,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:33:24,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:33:24,884 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:33:24,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:33:24,885 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:33:24,886 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:33:24,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:33:24,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:33:24,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:33:24,886 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:33:24,886 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:33:24,886 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:33:24,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:33:24,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:33:24,887 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:33:24,887 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:33:24,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:33:24,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:33:24,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:33:24,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:33:24,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:33:24,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:33:24,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:33:24,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:33:24,888 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:33:24,889 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:33:24,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:33:24,889 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:33:24,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:33:25,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:33:25,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:33:25,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:33:25,175 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:33:25,176 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:33:25,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-30 00:33:26,294 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:33:26,478 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:33:26,479 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-30 00:33:26,485 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40cb90d36/bed809e1b7a74ba0b299bc728509f315/FLAG0b5f49db5 [2023-08-30 00:33:26,499 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40cb90d36/bed809e1b7a74ba0b299bc728509f315 [2023-08-30 00:33:26,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:33:26,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:33:26,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:33:26,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:33:26,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:33:26,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:33:26" (1/1) ... [2023-08-30 00:33:26,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156f59f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:26, skipping insertion in model container [2023-08-30 00:33:26,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:33:26" (1/1) ... [2023-08-30 00:33:26,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:33:26,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:33:26,664 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2533,2546] [2023-08-30 00:33:26,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:33:26,688 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:33:26,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17ebcf30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:26, skipping insertion in model container [2023-08-30 00:33:26,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:33:26,691 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:33:26,692 INFO L158 Benchmark]: Toolchain (without parser) took 189.46ms. Allocated memory is still 62.9MB. Free memory was 31.8MB in the beginning and 35.7MB in the end (delta: -3.8MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2023-08-30 00:33:26,693 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 52.4MB. Free memory is still 30.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:33:26,693 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.45ms. Allocated memory is still 62.9MB. Free memory was 31.7MB in the beginning and 35.9MB in the end (delta: -4.2MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2023-08-30 00:33:26,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 52.4MB. Free memory is still 30.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 186.45ms. Allocated memory is still 62.9MB. Free memory was 31.7MB in the beginning and 35.9MB in the end (delta: -4.2MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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/popl20-more-mts.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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:33:28,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:33:28,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:33:28,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:33:28,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:33:28,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:33:28,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:33:28,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:33:28,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:33:28,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:33:28,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:33:28,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:33:28,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:33:28,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:33:28,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:33:28,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:33:28,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:33:28,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:33:28,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:33:28,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:33:28,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:33:28,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:33:28,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:33:28,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:33:28,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:33:28,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:33:28,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:33:28,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:33:28,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:33:28,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:33:28,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:33:28,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:33:28,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:33:28,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:33:28,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:33:28,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:33:28,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:33:28,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:33:28,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:33:28,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:33:28,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:33:28,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:33:28,448 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:33:28,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:33:28,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:33:28,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:33:28,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:33:28,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:33:28,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:33:28,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:33:28,451 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:33:28,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:33:28,452 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:33:28,452 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:33:28,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:33:28,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:33:28,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:33:28,453 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:33:28,453 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:33:28,453 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:33:28,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:33:28,453 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:33:28,453 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:33:28,454 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:33:28,454 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:33:28,454 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:33:28,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:33:28,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:33:28,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:33:28,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:33:28,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:33:28,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:33:28,455 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:33:28,455 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:33:28,455 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:33:28,455 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:33:28,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:33:28,456 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:33:28,456 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:33:28,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:33:28,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:33:28,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:33:28,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:33:28,771 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:33:28,773 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:33:28,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-30 00:33:29,775 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:33:29,927 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:33:29,928 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-30 00:33:29,934 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77578a717/375f4ac9f4e14c399c4765d714fca824/FLAG746d0ece8 [2023-08-30 00:33:29,946 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77578a717/375f4ac9f4e14c399c4765d714fca824 [2023-08-30 00:33:29,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:33:29,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:33:29,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:33:29,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:33:29,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:33:29,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:33:29" (1/1) ... [2023-08-30 00:33:29,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2296ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:29, skipping insertion in model container [2023-08-30 00:33:29,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:33:29" (1/1) ... [2023-08-30 00:33:29,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:33:29,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:33:30,116 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2533,2546] [2023-08-30 00:33:30,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:33:30,143 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:33:30,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:33:30,167 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2533,2546] [2023-08-30 00:33:30,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:33:30,181 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:33:30,206 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2533,2546] [2023-08-30 00:33:30,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:33:30,218 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:33:30,219 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:33:30,223 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:33:30,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30 WrapperNode [2023-08-30 00:33:30,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:33:30,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:33:30,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:33:30,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:33:30,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,270 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 221 [2023-08-30 00:33:30,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:33:30,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:33:30,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:33:30,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:33:30,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,331 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:33:30,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:33:30,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:33:30,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:33:30,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (1/1) ... [2023-08-30 00:33:30,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:33:30,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:33:30,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:33:30,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:33:30,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:33:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:33:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:33:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:33:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:33:30,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:33:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:33:30,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:33:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:33:30,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:33:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:33:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:33:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:33:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:33:30,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:33:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:33:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:33:30,404 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:33:30,511 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:33:30,512 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:33:30,928 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:33:31,078 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:33:31,078 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:33:31,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:33:31 BoogieIcfgContainer [2023-08-30 00:33:31,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:33:31,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:33:31,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:33:31,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:33:31,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:33:29" (1/3) ... [2023-08-30 00:33:31,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19accf36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:33:31, skipping insertion in model container [2023-08-30 00:33:31,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:33:30" (2/3) ... [2023-08-30 00:33:31,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19accf36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:33:31, skipping insertion in model container [2023-08-30 00:33:31,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:33:31" (3/3) ... [2023-08-30 00:33:31,088 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2023-08-30 00:33:31,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:33:31,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 00:33:31,102 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:33:31,198 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:33:31,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 233 transitions, 490 flow [2023-08-30 00:33:31,343 INFO L130 PetriNetUnfolder]: 18/230 cut-off events. [2023-08-30 00:33:31,343 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:33:31,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 230 events. 18/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 456 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-08-30 00:33:31,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 233 transitions, 490 flow [2023-08-30 00:33:31,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 226 transitions, 470 flow [2023-08-30 00:33:31,362 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:33:31,369 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 226 transitions, 470 flow [2023-08-30 00:33:31,372 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 226 transitions, 470 flow [2023-08-30 00:33:31,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 226 transitions, 470 flow [2023-08-30 00:33:31,409 INFO L130 PetriNetUnfolder]: 18/226 cut-off events. [2023-08-30 00:33:31,409 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:33:31,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 18/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 454 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-08-30 00:33:31,435 INFO L119 LiptonReduction]: Number of co-enabled transitions 10284 [2023-08-30 00:33:51,966 INFO L134 LiptonReduction]: Checked pairs total: 11639 [2023-08-30 00:33:51,966 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-08-30 00:33:51,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:33:51,980 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;@60803c8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:33:51,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-30 00:33:51,982 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:33:51,982 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:33:51,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:33:51,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:33:51,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:33:51,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:33:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash 33782, now seen corresponding path program 1 times [2023-08-30 00:33:51,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:33:51,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204318276] [2023-08-30 00:33:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:33:51,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:51,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:33:51,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:33:51,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:33:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:33:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:33:52,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:33:52,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:33:52,234 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 17 treesize of output 44 [2023-08-30 00:33:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:33:52,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:33:52,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:33:52,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204318276] [2023-08-30 00:33:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204318276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:33:52,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:33:52,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:33:52,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734010951] [2023-08-30 00:33:52,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:33:52,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:33:52,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:33:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:33:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:33:52,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-30 00:33:52,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:52,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:33:52,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-30 00:33:52,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:33:53,839 INFO L130 PetriNetUnfolder]: 7419/9490 cut-off events. [2023-08-30 00:33:53,840 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 00:33:53,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19157 conditions, 9490 events. 7419/9490 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 45174 event pairs, 3802 based on Foata normal form. 0/3100 useless extension candidates. Maximal degree in co-relation 8432. Up to 4711 conditions per place. [2023-08-30 00:33:53,893 INFO L137 encePairwiseOnDemand]: 467/479 looper letters, 82 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-30 00:33:53,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 378 flow [2023-08-30 00:33:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:33:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:33:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 709 transitions. [2023-08-30 00:33:53,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933890048712596 [2023-08-30 00:33:53,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 709 transitions. [2023-08-30 00:33:53,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 709 transitions. [2023-08-30 00:33:53,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:33:53,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 709 transitions. [2023-08-30 00:33:53,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:53,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:53,929 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:53,930 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 128 flow. Second operand 3 states and 709 transitions. [2023-08-30 00:33:53,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 378 flow [2023-08-30 00:33:53,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 354 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:33:53,944 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 110 flow [2023-08-30 00:33:53,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-30 00:33:53,952 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-08-30 00:33:53,953 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 110 flow [2023-08-30 00:33:53,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:53,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:33:53,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:33:53,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 00:33:54,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:54,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:33:54,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:33:54,191 INFO L85 PathProgramCache]: Analyzing trace with hash 33781, now seen corresponding path program 1 times [2023-08-30 00:33:54,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:33:54,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513466448] [2023-08-30 00:33:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:33:54,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:33:54,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:33:54,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:33:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:33:54,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:33:54,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:33:54,299 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:33:54,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:33:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:33:54,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:33:54,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:33:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513466448] [2023-08-30 00:33:54,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513466448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:33:54,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:33:54,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:33:54,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24639503] [2023-08-30 00:33:54,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:33:54,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:33:54,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:33:54,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:33:54,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:33:54,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-30 00:33:54,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:54,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:33:54,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-30 00:33:54,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:33:55,154 INFO L130 PetriNetUnfolder]: 7419/9488 cut-off events. [2023-08-30 00:33:55,154 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:33:55,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 9488 events. 7419/9488 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 45141 event pairs, 3802 based on Foata normal form. 0/3095 useless extension candidates. Maximal degree in co-relation 9497. Up to 9416 conditions per place. [2023-08-30 00:33:55,189 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-30 00:33:55,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 194 flow [2023-08-30 00:33:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:33:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:33:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-30 00:33:55,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4516353514265832 [2023-08-30 00:33:55,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-30 00:33:55,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-30 00:33:55,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:33:55,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-30 00:33:55,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:55,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:55,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:55,196 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 110 flow. Second operand 3 states and 649 transitions. [2023-08-30 00:33:55,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 194 flow [2023-08-30 00:33:55,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:33:55,198 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 108 flow [2023-08-30 00:33:55,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-30 00:33:55,199 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-08-30 00:33:55,199 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 108 flow [2023-08-30 00:33:55,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:55,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:33:55,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:33:55,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:33:55,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:55,407 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:33:55,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:33:55,407 INFO L85 PathProgramCache]: Analyzing trace with hash 33873, now seen corresponding path program 1 times [2023-08-30 00:33:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:33:55,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207090953] [2023-08-30 00:33:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:33:55,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:55,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:33:55,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:33:55,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:33:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:33:55,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:33:55,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:33:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:33:55,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:33:55,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:33:55,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207090953] [2023-08-30 00:33:55,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207090953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:33:55,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:33:55,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:33:55,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767202450] [2023-08-30 00:33:55,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:33:55,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:33:55,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:33:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:33:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:33:55,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 479 [2023-08-30 00:33:55,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:55,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:33:55,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 479 [2023-08-30 00:33:55,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:33:56,118 INFO L130 PetriNetUnfolder]: 3710/4746 cut-off events. [2023-08-30 00:33:56,118 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 00:33:56,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9508 conditions, 4746 events. 3710/4746 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 20488 event pairs, 1901 based on Foata normal form. 1/1550 useless extension candidates. Maximal degree in co-relation 9500. Up to 4710 conditions per place. [2023-08-30 00:33:56,143 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 00:33:56,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 194 flow [2023-08-30 00:33:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:33:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:33:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-08-30 00:33:56,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45789839944328464 [2023-08-30 00:33:56,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-08-30 00:33:56,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-08-30 00:33:56,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:33:56,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-08-30 00:33:56,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:56,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:56,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:56,151 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 108 flow. Second operand 3 states and 658 transitions. [2023-08-30 00:33:56,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 194 flow [2023-08-30 00:33:56,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:33:56,155 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 117 flow [2023-08-30 00:33:56,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-30 00:33:56,157 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-30 00:33:56,157 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 117 flow [2023-08-30 00:33:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:56,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:33:56,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:33:56,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-08-30 00:33:56,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:56,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:33:56,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:33:56,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1049774, now seen corresponding path program 1 times [2023-08-30 00:33:56,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:33:56,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477281469] [2023-08-30 00:33:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:33:56,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:33:56,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:33:56,392 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 (5)] Waiting until timeout for monitored process [2023-08-30 00:33:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:33:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:33:56,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:33:56,512 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 00:33:56,513 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 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 00:33:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:33:56,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:33:56,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:33:56,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477281469] [2023-08-30 00:33:56,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477281469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:33:56,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:33:56,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:33:56,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474399048] [2023-08-30 00:33:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:33:56,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:33:56,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:33:56,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:33:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:33:56,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-30 00:33:56,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:56,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:33:56,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-30 00:33:56,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:33:57,253 INFO L130 PetriNetUnfolder]: 2912/3767 cut-off events. [2023-08-30 00:33:57,253 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 00:33:57,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 3767 events. 2912/3767 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 16047 event pairs, 1487 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 7545. Up to 3731 conditions per place. [2023-08-30 00:33:57,270 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 00:33:57,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 193 flow [2023-08-30 00:33:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:33:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:33:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-30 00:33:57,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509394572025052 [2023-08-30 00:33:57,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-30 00:33:57,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-30 00:33:57,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:33:57,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-30 00:33:57,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:57,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:57,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:57,277 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 117 flow. Second operand 3 states and 648 transitions. [2023-08-30 00:33:57,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 193 flow [2023-08-30 00:33:57,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:33:57,278 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 109 flow [2023-08-30 00:33:57,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-08-30 00:33:57,279 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-08-30 00:33:57,279 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 109 flow [2023-08-30 00:33:57,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:57,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:33:57,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:33:57,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:33:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:57,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:33:57,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:33:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1049683, now seen corresponding path program 1 times [2023-08-30 00:33:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:33:57,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876228916] [2023-08-30 00:33:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:33:57,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:57,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:33:57,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:33:57,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:33:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:33:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:33:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:33:57,658 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:33:57,658 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 17 treesize of output 44 [2023-08-30 00:33:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:33:57,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:33:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:33:57,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:33:57,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876228916] [2023-08-30 00:33:57,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876228916] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:33:57,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:33:57,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:33:57,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960231415] [2023-08-30 00:33:57,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:33:57,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:33:57,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:33:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:33:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:33:58,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 479 [2023-08-30 00:33:58,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:58,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:33:58,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 479 [2023-08-30 00:33:58,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:33:59,471 INFO L130 PetriNetUnfolder]: 5827/7537 cut-off events. [2023-08-30 00:33:59,472 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:33:59,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15110 conditions, 7537 events. 5827/7537 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 35610 event pairs, 2974 based on Foata normal form. 0/2603 useless extension candidates. Maximal degree in co-relation 15100. Up to 3732 conditions per place. [2023-08-30 00:33:59,506 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 76 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2023-08-30 00:33:59,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 88 transitions, 391 flow [2023-08-30 00:33:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:33:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:33:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1270 transitions. [2023-08-30 00:33:59,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441892832289492 [2023-08-30 00:33:59,510 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1270 transitions. [2023-08-30 00:33:59,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1270 transitions. [2023-08-30 00:33:59,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:33:59,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1270 transitions. [2023-08-30 00:33:59,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 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) [2023-08-30 00:33:59,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:59,518 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:59,518 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 109 flow. Second operand 6 states and 1270 transitions. [2023-08-30 00:33:59,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 88 transitions, 391 flow [2023-08-30 00:33:59,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 88 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:33:59,520 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 186 flow [2023-08-30 00:33:59,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-30 00:33:59,522 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2023-08-30 00:33:59,522 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 186 flow [2023-08-30 00:33:59,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:59,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:33:59,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:33:59,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:33:59,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:59,731 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:33:59,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:33:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1049775, now seen corresponding path program 1 times [2023-08-30 00:33:59,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:33:59,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409765306] [2023-08-30 00:33:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:33:59,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:59,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:33:59,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:33:59,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:33:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:33:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:33:59,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:33:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:33:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:33:59,901 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 00:33:59,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 00:33:59,920 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 00:33:59,920 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 90 treesize of output 89 [2023-08-30 00:34:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:00,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:00,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:00,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409765306] [2023-08-30 00:34:00,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409765306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:00,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:00,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:34:00,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217365565] [2023-08-30 00:34:00,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:00,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:34:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:34:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:34:00,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-08-30 00:34:00,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:00,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:00,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-08-30 00:34:00,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:01,847 INFO L130 PetriNetUnfolder]: 5027/6556 cut-off events. [2023-08-30 00:34:01,847 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 00:34:01,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13171 conditions, 6556 events. 5027/6556 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 30925 event pairs, 2560 based on Foata normal form. 0/2352 useless extension candidates. Maximal degree in co-relation 13156. Up to 3729 conditions per place. [2023-08-30 00:34:01,897 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 72 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2023-08-30 00:34:01,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 414 flow [2023-08-30 00:34:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:34:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:34:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1436 transitions. [2023-08-30 00:34:01,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282731881896809 [2023-08-30 00:34:01,906 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1436 transitions. [2023-08-30 00:34:01,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1436 transitions. [2023-08-30 00:34:01,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:01,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1436 transitions. [2023-08-30 00:34:01,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 205.14285714285714) internal successors, (1436), 7 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:01,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:01,913 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:01,913 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 186 flow. Second operand 7 states and 1436 transitions. [2023-08-30 00:34:01,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 414 flow [2023-08-30 00:34:01,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 398 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 00:34:01,916 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 176 flow [2023-08-30 00:34:01,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=176, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2023-08-30 00:34:01,919 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-30 00:34:01,920 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 176 flow [2023-08-30 00:34:01,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:01,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:01,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:34:01,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:02,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:02,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:02,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1008859758, now seen corresponding path program 1 times [2023-08-30 00:34:02,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:02,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696891730] [2023-08-30 00:34:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:02,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:02,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:02,149 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:02,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:34:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:02,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:34:02,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:02,307 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:34:02,307 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 00:34:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:34:02,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:34:02,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:02,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696891730] [2023-08-30 00:34:02,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696891730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:34:02,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:34:02,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:34:02,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906630523] [2023-08-30 00:34:02,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:34:02,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:34:02,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:02,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:34:02,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:34:02,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-30 00:34:02,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:02,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:02,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-30 00:34:02,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:03,130 INFO L130 PetriNetUnfolder]: 4825/6282 cut-off events. [2023-08-30 00:34:03,130 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2023-08-30 00:34:03,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12777 conditions, 6282 events. 4825/6282 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 29365 event pairs, 2454 based on Foata normal form. 0/2435 useless extension candidates. Maximal degree in co-relation 12760. Up to 6210 conditions per place. [2023-08-30 00:34:03,154 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 43 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-30 00:34:03,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 47 transitions, 260 flow [2023-08-30 00:34:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:34:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:34:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-30 00:34:03,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495476687543493 [2023-08-30 00:34:03,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-30 00:34:03,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-30 00:34:03,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:03,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-30 00:34:03,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:03,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:03,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:03,161 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 176 flow. Second operand 3 states and 646 transitions. [2023-08-30 00:34:03,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 47 transitions, 260 flow [2023-08-30 00:34:03,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 234 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 00:34:03,162 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 148 flow [2023-08-30 00:34:03,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2023-08-30 00:34:03,163 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2023-08-30 00:34:03,163 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 148 flow [2023-08-30 00:34:03,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:03,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:03,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:34:03,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:03,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:03,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:03,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1008859757, now seen corresponding path program 1 times [2023-08-30 00:34:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:03,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960049910] [2023-08-30 00:34:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:03,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:03,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:03,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:03,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:34:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:34:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:03,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:34:03,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:34:03,525 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 00:34:03,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 00:34:03,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 00:34:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:03,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:03,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:03,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960049910] [2023-08-30 00:34:03,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960049910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:03,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:03,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:34:03,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810934714] [2023-08-30 00:34:03,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:03,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:34:03,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:34:03,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:34:04,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-08-30 00:34:04,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 148 flow. Second operand has 8 states, 8 states have (on average 194.25) internal successors, (1554), 8 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:04,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:04,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-08-30 00:34:04,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:05,620 INFO L130 PetriNetUnfolder]: 4623/6008 cut-off events. [2023-08-30 00:34:05,621 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-30 00:34:05,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12216 conditions, 6008 events. 4623/6008 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 27886 event pairs, 2348 based on Foata normal form. 0/2382 useless extension candidates. Maximal degree in co-relation 12200. Up to 3460 conditions per place. [2023-08-30 00:34:05,642 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 70 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-08-30 00:34:05,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 364 flow [2023-08-30 00:34:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:34:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:34:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1038 transitions. [2023-08-30 00:34:05,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334029227557411 [2023-08-30 00:34:05,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1038 transitions. [2023-08-30 00:34:05,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1038 transitions. [2023-08-30 00:34:05,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:05,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1038 transitions. [2023-08-30 00:34:05,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:05,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:05,650 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:05,650 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 148 flow. Second operand 5 states and 1038 transitions. [2023-08-30 00:34:05,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 364 flow [2023-08-30 00:34:05,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:34:05,652 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 149 flow [2023-08-30 00:34:05,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-08-30 00:34:05,652 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2023-08-30 00:34:05,653 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 149 flow [2023-08-30 00:34:05,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.25) internal successors, (1554), 8 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:05,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:05,653 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:34:05,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-08-30 00:34:05,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:05,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:05,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:05,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1208759186, now seen corresponding path program 2 times [2023-08-30 00:34:05,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:05,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58781199] [2023-08-30 00:34:05,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:34:05,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:05,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:05,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:05,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:34:05,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:34:05,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:34:05,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:34:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:05,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:34:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:34:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:34:06,005 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 00:34:06,005 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 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 00:34:06,019 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:34:06,019 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 [2023-08-30 00:34:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:34:06,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:34:06,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58781199] [2023-08-30 00:34:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58781199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:34:06,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:34:06,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:34:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172937744] [2023-08-30 00:34:06,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:34:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:34:06,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:34:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:34:08,177 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] [2023-08-30 00:34:10,221 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] [2023-08-30 00:34:10,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 479 [2023-08-30 00:34:10,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:10,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:10,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 479 [2023-08-30 00:34:10,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:10,833 INFO L130 PetriNetUnfolder]: 4623/6007 cut-off events. [2023-08-30 00:34:10,834 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-30 00:34:10,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12215 conditions, 6007 events. 4623/6007 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 27882 event pairs, 2348 based on Foata normal form. 0/2375 useless extension candidates. Maximal degree in co-relation 12198. Up to 5935 conditions per place. [2023-08-30 00:34:10,863 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 00:34:10,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 44 transitions, 225 flow [2023-08-30 00:34:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:34:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:34:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-30 00:34:10,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44467640918580376 [2023-08-30 00:34:10,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-30 00:34:10,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-30 00:34:10,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:10,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-30 00:34:10,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:10,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:10,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:10,869 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 149 flow. Second operand 3 states and 639 transitions. [2023-08-30 00:34:10,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 44 transitions, 225 flow [2023-08-30 00:34:10,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:34:10,871 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 140 flow [2023-08-30 00:34:10,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2023-08-30 00:34:10,871 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -6 predicate places. [2023-08-30 00:34:10,872 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 140 flow [2023-08-30 00:34:10,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:10,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:10,874 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:34:10,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:11,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:11,080 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:11,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1208759094, now seen corresponding path program 2 times [2023-08-30 00:34:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:11,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538596771] [2023-08-30 00:34:11,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:34:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:11,082 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:11,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:34:11,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:34:11,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:34:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:34:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:11,289 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:34:11,290 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 17 treesize of output 44 [2023-08-30 00:34:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:11,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:11,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538596771] [2023-08-30 00:34:11,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538596771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:11,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:11,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:34:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894047751] [2023-08-30 00:34:11,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:11,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:34:11,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:34:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:34:15,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 479 [2023-08-30 00:34:15,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 140 flow. Second operand has 12 states, 12 states have (on average 199.0) internal successors, (2388), 12 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:15,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:15,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 479 [2023-08-30 00:34:15,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:20,572 INFO L130 PetriNetUnfolder]: 23585/30428 cut-off events. [2023-08-30 00:34:20,572 INFO L131 PetriNetUnfolder]: For 1022/1022 co-relation queries the response was YES. [2023-08-30 00:34:20,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62179 conditions, 30428 events. 23585/30428 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 1617. Compared 165553 event pairs, 12015 based on Foata normal form. 6/12130 useless extension candidates. Maximal degree in co-relation 62162. Up to 3454 conditions per place. [2023-08-30 00:34:20,722 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 289 selfloop transitions, 12 changer transitions 0/304 dead transitions. [2023-08-30 00:34:20,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 304 transitions, 1378 flow [2023-08-30 00:34:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:34:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:34:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2683 transitions. [2023-08-30 00:34:20,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46677105080027836 [2023-08-30 00:34:20,749 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2683 transitions. [2023-08-30 00:34:20,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2683 transitions. [2023-08-30 00:34:20,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:20,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2683 transitions. [2023-08-30 00:34:20,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 223.58333333333334) internal successors, (2683), 12 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:20,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:20,778 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:20,779 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 140 flow. Second operand 12 states and 2683 transitions. [2023-08-30 00:34:20,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 304 transitions, 1378 flow [2023-08-30 00:34:20,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 304 transitions, 1377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:34:20,782 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 237 flow [2023-08-30 00:34:20,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-30 00:34:20,783 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 11 predicate places. [2023-08-30 00:34:20,783 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 237 flow [2023-08-30 00:34:20,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 199.0) internal successors, (2388), 12 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:20,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:20,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:34:20,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:21,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:21,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:21,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1209873206, now seen corresponding path program 1 times [2023-08-30 00:34:21,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:21,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105562926] [2023-08-30 00:34:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:21,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:21,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:21,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:21,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:34:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:34:21,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:21,133 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:34:21,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:34:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:34:21,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:34:21,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:21,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105562926] [2023-08-30 00:34:21,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105562926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:34:21,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:34:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:34:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548187180] [2023-08-30 00:34:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:34:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:34:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:34:21,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:34:21,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2023-08-30 00:34:21,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:21,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:21,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2023-08-30 00:34:21,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:22,964 INFO L130 PetriNetUnfolder]: 12822/16955 cut-off events. [2023-08-30 00:34:22,964 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2023-08-30 00:34:22,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34703 conditions, 16955 events. 12822/16955 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 90866 event pairs, 6580 based on Foata normal form. 0/8089 useless extension candidates. Maximal degree in co-relation 34678. Up to 16717 conditions per place. [2023-08-30 00:34:23,027 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-30 00:34:23,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 48 transitions, 321 flow [2023-08-30 00:34:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:34:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:34:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-08-30 00:34:23,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41701461377870563 [2023-08-30 00:34:23,029 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-08-30 00:34:23,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-08-30 00:34:23,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:23,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-08-30 00:34:23,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:23,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:23,033 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:23,033 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 237 flow. Second operand 4 states and 799 transitions. [2023-08-30 00:34:23,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 48 transitions, 321 flow [2023-08-30 00:34:23,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 48 transitions, 296 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:34:23,035 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 216 flow [2023-08-30 00:34:23,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-08-30 00:34:23,036 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-30 00:34:23,036 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 216 flow [2023-08-30 00:34:23,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:23,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:23,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:34:23,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:23,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:23,244 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:23,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1209873207, now seen corresponding path program 1 times [2023-08-30 00:34:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:23,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651557614] [2023-08-30 00:34:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:23,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:23,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:23,246 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:23,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:34:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:34:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:23,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:23,490 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 25 treesize of output 21 [2023-08-30 00:34:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:23,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651557614] [2023-08-30 00:34:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651557614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:23,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:34:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487114960] [2023-08-30 00:34:23,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:34:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:34:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:34:25,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2023-08-30 00:34:25,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 216 flow. Second operand has 10 states, 10 states have (on average 193.2) internal successors, (1932), 10 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:25,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:25,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2023-08-30 00:34:25,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:28,089 INFO L130 PetriNetUnfolder]: 19941/26750 cut-off events. [2023-08-30 00:34:28,089 INFO L131 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2023-08-30 00:34:28,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55023 conditions, 26750 events. 19941/26750 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 1257. Compared 153271 event pairs, 5250 based on Foata normal form. 0/14026 useless extension candidates. Maximal degree in co-relation 54997. Up to 11729 conditions per place. [2023-08-30 00:34:28,197 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 139 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2023-08-30 00:34:28,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 157 transitions, 776 flow [2023-08-30 00:34:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:34:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:34:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2258 transitions. [2023-08-30 00:34:28,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4285443158094515 [2023-08-30 00:34:28,201 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2258 transitions. [2023-08-30 00:34:28,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2258 transitions. [2023-08-30 00:34:28,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:28,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2258 transitions. [2023-08-30 00:34:28,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 205.27272727272728) internal successors, (2258), 11 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:28,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:28,209 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:28,209 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 216 flow. Second operand 11 states and 2258 transitions. [2023-08-30 00:34:28,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 157 transitions, 776 flow [2023-08-30 00:34:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 157 transitions, 769 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:34:28,216 INFO L231 Difference]: Finished difference. Result has 80 places, 55 transitions, 288 flow [2023-08-30 00:34:28,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=288, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2023-08-30 00:34:28,216 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 19 predicate places. [2023-08-30 00:34:28,217 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 288 flow [2023-08-30 00:34:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.2) internal successors, (1932), 10 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:28,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:28,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:34:28,237 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 (13)] Ended with exit code 0 [2023-08-30 00:34:28,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:28,425 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:28,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:28,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1148355339, now seen corresponding path program 1 times [2023-08-30 00:34:28,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:28,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967935839] [2023-08-30 00:34:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:28,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:28,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:28,427 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:28,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:34:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:34:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:28,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:34:28,635 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 17 treesize of output 44 [2023-08-30 00:34:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:28,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:28,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:28,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967935839] [2023-08-30 00:34:28,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967935839] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:28,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:28,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:34:28,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877510988] [2023-08-30 00:34:28,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:28,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:34:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:28,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:34:28,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:34:31,124 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] [2023-08-30 00:34:33,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:34:33,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-08-30 00:34:33,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 288 flow. Second operand has 8 states, 8 states have (on average 194.75) internal successors, (1558), 8 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:33,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:33,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-08-30 00:34:33,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:35,683 INFO L130 PetriNetUnfolder]: 16134/21847 cut-off events. [2023-08-30 00:34:35,683 INFO L131 PetriNetUnfolder]: For 9002/10240 co-relation queries the response was YES. [2023-08-30 00:34:35,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50512 conditions, 21847 events. 16134/21847 cut-off events. For 9002/10240 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 126621 event pairs, 9438 based on Foata normal form. 1238/14581 useless extension candidates. Maximal degree in co-relation 50482. Up to 19748 conditions per place. [2023-08-30 00:34:35,802 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 70 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-30 00:34:35,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 77 transitions, 492 flow [2023-08-30 00:34:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:34:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:34:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1027 transitions. [2023-08-30 00:34:35,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42881002087682674 [2023-08-30 00:34:35,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1027 transitions. [2023-08-30 00:34:35,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1027 transitions. [2023-08-30 00:34:35,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:35,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1027 transitions. [2023-08-30 00:34:35,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.4) internal successors, (1027), 5 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:35,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:35,811 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:35,811 INFO L175 Difference]: Start difference. First operand has 80 places, 55 transitions, 288 flow. Second operand 5 states and 1027 transitions. [2023-08-30 00:34:35,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 77 transitions, 492 flow [2023-08-30 00:34:35,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 475 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 00:34:35,819 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 273 flow [2023-08-30 00:34:35,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2023-08-30 00:34:35,819 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2023-08-30 00:34:35,819 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 273 flow [2023-08-30 00:34:35,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.75) internal successors, (1558), 8 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:35,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:35,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:34:35,837 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 [2023-08-30 00:34:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:36,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:36,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1148355340, now seen corresponding path program 1 times [2023-08-30 00:34:36,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:36,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982489401] [2023-08-30 00:34:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:36,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:36,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:36,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:36,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:34:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:34:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:36,180 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-30 00:34:36,180 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 46 [2023-08-30 00:34:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:34:36,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:34:36,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:36,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982489401] [2023-08-30 00:34:36,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982489401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:34:36,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:34:36,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:34:36,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696321300] [2023-08-30 00:34:36,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:34:36,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:34:36,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:36,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:34:36,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:34:36,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 479 [2023-08-30 00:34:36,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:36,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:36,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 479 [2023-08-30 00:34:36,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:38,102 INFO L130 PetriNetUnfolder]: 15489/20815 cut-off events. [2023-08-30 00:34:38,102 INFO L131 PetriNetUnfolder]: For 8201/9333 co-relation queries the response was YES. [2023-08-30 00:34:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48133 conditions, 20815 events. 15489/20815 cut-off events. For 8201/9333 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 118758 event pairs, 8985 based on Foata normal form. 1132/13951 useless extension candidates. Maximal degree in co-relation 48104. Up to 20559 conditions per place. [2023-08-30 00:34:38,196 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 46 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 00:34:38,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 363 flow [2023-08-30 00:34:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:34:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:34:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-30 00:34:38,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363256784968685 [2023-08-30 00:34:38,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-30 00:34:38,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-30 00:34:38,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:38,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-30 00:34:38,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:38,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:38,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:38,201 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 273 flow. Second operand 3 states and 627 transitions. [2023-08-30 00:34:38,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 363 flow [2023-08-30 00:34:38,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 51 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:34:38,208 INFO L231 Difference]: Finished difference. Result has 75 places, 51 transitions, 266 flow [2023-08-30 00:34:38,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=266, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2023-08-30 00:34:38,209 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2023-08-30 00:34:38,209 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 266 flow [2023-08-30 00:34:38,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:38,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:38,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:34:38,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:38,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:38,417 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:38,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1247812592, now seen corresponding path program 1 times [2023-08-30 00:34:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868380851] [2023-08-30 00:34:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:38,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:38,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:38,419 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:38,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:34:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:34:38,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:38,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:38,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:34:38,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:34:38,635 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 70 treesize of output 68 [2023-08-30 00:34:38,638 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 68 treesize of output 66 [2023-08-30 00:34:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:38,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868380851] [2023-08-30 00:34:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868380851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:38,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:38,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:34:38,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200654481] [2023-08-30 00:34:38,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:38,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:34:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:34:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:34:39,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 479 [2023-08-30 00:34:39,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 266 flow. Second operand has 12 states, 12 states have (on average 198.33333333333334) internal successors, (2380), 12 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:39,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:39,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 479 [2023-08-30 00:34:39,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:41,880 INFO L130 PetriNetUnfolder]: 17345/23084 cut-off events. [2023-08-30 00:34:41,881 INFO L131 PetriNetUnfolder]: For 9206/9206 co-relation queries the response was YES. [2023-08-30 00:34:41,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53981 conditions, 23084 events. 17345/23084 cut-off events. For 9206/9206 co-relation queries the response was YES. Maximal size of possible extension queue 1167. Compared 131129 event pairs, 6336 based on Foata normal form. 156/14347 useless extension candidates. Maximal degree in co-relation 53952. Up to 13985 conditions per place. [2023-08-30 00:34:42,113 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 93 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2023-08-30 00:34:42,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 600 flow [2023-08-30 00:34:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:34:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:34:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2065 transitions. [2023-08-30 00:34:42,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311064718162839 [2023-08-30 00:34:42,118 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2065 transitions. [2023-08-30 00:34:42,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2065 transitions. [2023-08-30 00:34:42,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:42,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2065 transitions. [2023-08-30 00:34:42,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.5) internal successors, (2065), 10 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:42,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:42,125 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:42,125 INFO L175 Difference]: Start difference. First operand has 75 places, 51 transitions, 266 flow. Second operand 10 states and 2065 transitions. [2023-08-30 00:34:42,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 600 flow [2023-08-30 00:34:42,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:34:42,141 INFO L231 Difference]: Finished difference. Result has 85 places, 50 transitions, 295 flow [2023-08-30 00:34:42,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=295, PETRI_PLACES=85, PETRI_TRANSITIONS=50} [2023-08-30 00:34:42,141 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 24 predicate places. [2023-08-30 00:34:42,142 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 50 transitions, 295 flow [2023-08-30 00:34:42,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.33333333333334) internal successors, (2380), 12 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:42,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:42,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:34:42,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:42,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:42,349 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:42,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1239284402, now seen corresponding path program 1 times [2023-08-30 00:34:42,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:42,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132557202] [2023-08-30 00:34:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:42,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:42,351 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:42,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:34:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:42,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:34:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:42,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:42,613 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 25 treesize of output 21 [2023-08-30 00:34:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:42,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:42,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132557202] [2023-08-30 00:34:42,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132557202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:42,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:42,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:34:42,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514494139] [2023-08-30 00:34:42,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:42,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:34:42,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:42,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:34:42,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:34:44,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2023-08-30 00:34:44,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 50 transitions, 295 flow. Second operand has 10 states, 10 states have (on average 193.6) internal successors, (1936), 10 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:44,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:44,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2023-08-30 00:34:44,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:47,705 INFO L130 PetriNetUnfolder]: 22267/30437 cut-off events. [2023-08-30 00:34:47,705 INFO L131 PetriNetUnfolder]: For 19925/21843 co-relation queries the response was YES. [2023-08-30 00:34:47,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76375 conditions, 30437 events. 22267/30437 cut-off events. For 19925/21843 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 186799 event pairs, 6361 based on Foata normal form. 1918/22731 useless extension candidates. Maximal degree in co-relation 76342. Up to 14353 conditions per place. [2023-08-30 00:34:47,842 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2023-08-30 00:34:47,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 841 flow [2023-08-30 00:34:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:34:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:34:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2231 transitions. [2023-08-30 00:34:47,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234200037957867 [2023-08-30 00:34:47,847 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2231 transitions. [2023-08-30 00:34:47,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2231 transitions. [2023-08-30 00:34:47,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:47,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2231 transitions. [2023-08-30 00:34:47,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 202.8181818181818) internal successors, (2231), 11 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:47,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:47,855 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:47,855 INFO L175 Difference]: Start difference. First operand has 85 places, 50 transitions, 295 flow. Second operand 11 states and 2231 transitions. [2023-08-30 00:34:47,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 841 flow [2023-08-30 00:34:47,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 827 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:34:47,879 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 354 flow [2023-08-30 00:34:47,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=354, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2023-08-30 00:34:47,879 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 34 predicate places. [2023-08-30 00:34:47,879 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 354 flow [2023-08-30 00:34:47,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.6) internal successors, (1936), 10 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:47,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:47,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:34:47,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:48,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:48,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:48,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2085426515, now seen corresponding path program 2 times [2023-08-30 00:34:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:48,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417294158] [2023-08-30 00:34:48,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:34:48,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:48,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:48,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:48,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:34:48,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:34:48,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:34:48,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:34:48,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:48,267 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 00:34:48,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 00:34:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:48,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:48,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:34:48,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:34:48,434 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 70 treesize of output 68 [2023-08-30 00:34:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:48,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417294158] [2023-08-30 00:34:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417294158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:48,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:48,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 00:34:48,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571028086] [2023-08-30 00:34:48,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:48,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:34:48,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:34:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:34:51,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2023-08-30 00:34:51,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 192.28571428571428) internal successors, (2692), 14 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:51,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:51,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2023-08-30 00:34:51,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:56,812 INFO L130 PetriNetUnfolder]: 30684/41784 cut-off events. [2023-08-30 00:34:56,812 INFO L131 PetriNetUnfolder]: For 32429/35297 co-relation queries the response was YES. [2023-08-30 00:34:57,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117301 conditions, 41784 events. 30684/41784 cut-off events. For 32429/35297 co-relation queries the response was YES. Maximal size of possible extension queue 1979. Compared 269916 event pairs, 7446 based on Foata normal form. 3668/36096 useless extension candidates. Maximal degree in co-relation 117263. Up to 14273 conditions per place. [2023-08-30 00:34:57,261 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 133 selfloop transitions, 14 changer transitions 0/150 dead transitions. [2023-08-30 00:34:57,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 150 transitions, 958 flow [2023-08-30 00:34:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:34:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:34:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2035 transitions. [2023-08-30 00:34:57,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42484342379958245 [2023-08-30 00:34:57,265 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2035 transitions. [2023-08-30 00:34:57,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2035 transitions. [2023-08-30 00:34:57,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:57,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2035 transitions. [2023-08-30 00:34:57,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 203.5) internal successors, (2035), 10 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:57,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:57,272 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:57,272 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 354 flow. Second operand 10 states and 2035 transitions. [2023-08-30 00:34:57,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 150 transitions, 958 flow [2023-08-30 00:34:57,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 947 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:34:57,605 INFO L231 Difference]: Finished difference. Result has 103 places, 59 transitions, 407 flow [2023-08-30 00:34:57,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=407, PETRI_PLACES=103, PETRI_TRANSITIONS=59} [2023-08-30 00:34:57,605 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 42 predicate places. [2023-08-30 00:34:57,606 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 59 transitions, 407 flow [2023-08-30 00:34:57,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 192.28571428571428) internal successors, (2692), 14 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:57,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:57,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:34:57,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:57,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:57,813 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:34:57,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1246211919, now seen corresponding path program 1 times [2023-08-30 00:34:57,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:57,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015317542] [2023-08-30 00:34:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:57,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:57,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:57,815 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:57,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:34:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:57,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:34:57,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:58,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:58,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:58,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015317542] [2023-08-30 00:34:58,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015317542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:58,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:58,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-08-30 00:34:58,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182348452] [2023-08-30 00:34:58,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:58,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 00:34:58,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 00:34:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-30 00:34:58,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 479 [2023-08-30 00:34:58,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 59 transitions, 407 flow. Second operand has 11 states, 11 states have (on average 196.63636363636363) internal successors, (2163), 11 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:58,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:58,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 479 [2023-08-30 00:34:58,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:35:04,171 INFO L130 PetriNetUnfolder]: 31024/42352 cut-off events. [2023-08-30 00:35:04,171 INFO L131 PetriNetUnfolder]: For 59240/61916 co-relation queries the response was YES. [2023-08-30 00:35:04,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127750 conditions, 42352 events. 31024/42352 cut-off events. For 59240/61916 co-relation queries the response was YES. Maximal size of possible extension queue 2054. Compared 272850 event pairs, 15624 based on Foata normal form. 2724/35556 useless extension candidates. Maximal degree in co-relation 127709. Up to 30409 conditions per place. [2023-08-30 00:35:04,529 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 86 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2023-08-30 00:35:04,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 753 flow [2023-08-30 00:35:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:35:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:35:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1832 transitions. [2023-08-30 00:35:04,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249594061702621 [2023-08-30 00:35:04,533 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1832 transitions. [2023-08-30 00:35:04,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1832 transitions. [2023-08-30 00:35:04,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:35:04,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1832 transitions. [2023-08-30 00:35:04,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.55555555555554) internal successors, (1832), 9 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:04,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:04,539 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:04,539 INFO L175 Difference]: Start difference. First operand has 103 places, 59 transitions, 407 flow. Second operand 9 states and 1832 transitions. [2023-08-30 00:35:04,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 753 flow [2023-08-30 00:35:04,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 727 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 00:35:04,615 INFO L231 Difference]: Finished difference. Result has 106 places, 57 transitions, 405 flow [2023-08-30 00:35:04,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=405, PETRI_PLACES=106, PETRI_TRANSITIONS=57} [2023-08-30 00:35:04,615 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 45 predicate places. [2023-08-30 00:35:04,615 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 57 transitions, 405 flow [2023-08-30 00:35:04,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 196.63636363636363) internal successors, (2163), 11 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:04,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:35:04,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:35:04,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:35:04,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:04,816 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:35:04,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:35:04,817 INFO L85 PathProgramCache]: Analyzing trace with hash 40912464, now seen corresponding path program 1 times [2023-08-30 00:35:04,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:35:04,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739774444] [2023-08-30 00:35:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:35:04,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:04,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:35:04,818 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:35:04,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:35:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:35:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:35:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:35:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:35:04,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:35:04,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:35:04,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739774444] [2023-08-30 00:35:04,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739774444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:35:04,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:35:04,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:35:04,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448199437] [2023-08-30 00:35:04,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:35:04,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:35:04,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:35:04,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:35:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:35:05,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 479 [2023-08-30 00:35:05,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 57 transitions, 405 flow. Second operand has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:05,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:35:05,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 479 [2023-08-30 00:35:05,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:35:08,310 INFO L130 PetriNetUnfolder]: 19367/27121 cut-off events. [2023-08-30 00:35:08,310 INFO L131 PetriNetUnfolder]: For 31416/34952 co-relation queries the response was YES. [2023-08-30 00:35:08,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83120 conditions, 27121 events. 19367/27121 cut-off events. For 31416/34952 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 176540 event pairs, 13331 based on Foata normal form. 5656/26648 useless extension candidates. Maximal degree in co-relation 83078. Up to 26958 conditions per place. [2023-08-30 00:35:08,616 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 50 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-30 00:35:08,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 56 transitions, 503 flow [2023-08-30 00:35:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:35:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:35:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-30 00:35:08,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43910925539318024 [2023-08-30 00:35:08,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-30 00:35:08,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-30 00:35:08,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:35:08,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-30 00:35:08,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:08,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:08,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:08,621 INFO L175 Difference]: Start difference. First operand has 106 places, 57 transitions, 405 flow. Second operand 3 states and 631 transitions. [2023-08-30 00:35:08,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 56 transitions, 503 flow [2023-08-30 00:35:08,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 56 transitions, 487 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 00:35:08,669 INFO L231 Difference]: Finished difference. Result has 102 places, 56 transitions, 387 flow [2023-08-30 00:35:08,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=102, PETRI_TRANSITIONS=56} [2023-08-30 00:35:08,674 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 41 predicate places. [2023-08-30 00:35:08,674 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 56 transitions, 387 flow [2023-08-30 00:35:08,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:08,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:35:08,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:35:08,699 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 (20)] Ended with exit code 0 [2023-08-30 00:35:08,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:08,881 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:35:08,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:35:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1238589692, now seen corresponding path program 1 times [2023-08-30 00:35:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:35:08,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348590144] [2023-08-30 00:35:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:35:08,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:08,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:35:08,883 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:35:08,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:35:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:35:08,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:35:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:35:09,090 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:35:09,091 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 17 treesize of output 44 [2023-08-30 00:35:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:09,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:35:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:09,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:35:09,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348590144] [2023-08-30 00:35:09,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348590144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:35:09,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:35:09,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:35:09,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209432478] [2023-08-30 00:35:09,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:35:09,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:35:09,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:35:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:35:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:35:14,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-08-30 00:35:14,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 56 transitions, 387 flow. Second operand has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:14,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:35:14,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-08-30 00:35:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:35:20,555 INFO L130 PetriNetUnfolder]: 18673/27249 cut-off events. [2023-08-30 00:35:20,555 INFO L131 PetriNetUnfolder]: For 42397/46567 co-relation queries the response was YES. [2023-08-30 00:35:20,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86959 conditions, 27249 events. 18673/27249 cut-off events. For 42397/46567 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 179374 event pairs, 13709 based on Foata normal form. 4170/27878 useless extension candidates. Maximal degree in co-relation 86918. Up to 18205 conditions per place. [2023-08-30 00:35:20,859 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 116 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2023-08-30 00:35:20,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 135 transitions, 975 flow [2023-08-30 00:35:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:35:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:35:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2177 transitions. [2023-08-30 00:35:20,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413171379768457 [2023-08-30 00:35:20,864 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2177 transitions. [2023-08-30 00:35:20,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2177 transitions. [2023-08-30 00:35:20,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:35:20,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2177 transitions. [2023-08-30 00:35:20,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 197.9090909090909) internal successors, (2177), 11 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:20,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:20,876 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:20,876 INFO L175 Difference]: Start difference. First operand has 102 places, 56 transitions, 387 flow. Second operand 11 states and 2177 transitions. [2023-08-30 00:35:20,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 135 transitions, 975 flow [2023-08-30 00:35:20,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 135 transitions, 974 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:35:20,908 INFO L231 Difference]: Finished difference. Result has 113 places, 60 transitions, 440 flow [2023-08-30 00:35:20,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=440, PETRI_PLACES=113, PETRI_TRANSITIONS=60} [2023-08-30 00:35:20,909 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 52 predicate places. [2023-08-30 00:35:20,909 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 60 transitions, 440 flow [2023-08-30 00:35:20,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:20,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:35:20,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:35:20,919 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 [2023-08-30 00:35:21,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:21,117 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:35:21,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:35:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1260659726, now seen corresponding path program 2 times [2023-08-30 00:35:21,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:35:21,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24016799] [2023-08-30 00:35:21,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:35:21,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:21,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:35:21,119 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:35:21,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:35:21,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:35:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:35:21,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:35:21,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:35:21,319 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:35:21,319 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 17 treesize of output 44 [2023-08-30 00:35:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:21,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:35:21,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:35:21,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:35:21,691 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 70 treesize of output 68 [2023-08-30 00:35:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:22,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:35:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24016799] [2023-08-30 00:35:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24016799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:35:22,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:35:22,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 00:35:22,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131884952] [2023-08-30 00:35:22,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:35:22,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:35:22,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:35:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:35:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:35:27,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-08-30 00:35:27,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 60 transitions, 440 flow. Second operand has 14 states, 14 states have (on average 189.57142857142858) internal successors, (2654), 14 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:27,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:35:27,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-08-30 00:35:27,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:35:35,300 INFO L130 PetriNetUnfolder]: 25389/36045 cut-off events. [2023-08-30 00:35:35,300 INFO L131 PetriNetUnfolder]: For 58145/61059 co-relation queries the response was YES. [2023-08-30 00:35:35,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130599 conditions, 36045 events. 25389/36045 cut-off events. For 58145/61059 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 244713 event pairs, 9181 based on Foata normal form. 3462/36103 useless extension candidates. Maximal degree in co-relation 130555. Up to 11144 conditions per place. [2023-08-30 00:35:35,552 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 248 selfloop transitions, 26 changer transitions 0/279 dead transitions. [2023-08-30 00:35:35,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 279 transitions, 2103 flow [2023-08-30 00:35:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 00:35:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 00:35:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3416 transitions. [2023-08-30 00:35:35,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41950141225592535 [2023-08-30 00:35:35,557 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3416 transitions. [2023-08-30 00:35:35,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3416 transitions. [2023-08-30 00:35:35,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:35:35,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3416 transitions. [2023-08-30 00:35:35,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.94117647058823) internal successors, (3416), 17 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:35,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:35,565 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:35,565 INFO L175 Difference]: Start difference. First operand has 113 places, 60 transitions, 440 flow. Second operand 17 states and 3416 transitions. [2023-08-30 00:35:35,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 279 transitions, 2103 flow [2023-08-30 00:35:35,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 279 transitions, 2059 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-30 00:35:35,899 INFO L231 Difference]: Finished difference. Result has 123 places, 75 transitions, 582 flow [2023-08-30 00:35:35,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=582, PETRI_PLACES=123, PETRI_TRANSITIONS=75} [2023-08-30 00:35:35,899 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 62 predicate places. [2023-08-30 00:35:35,900 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 75 transitions, 582 flow [2023-08-30 00:35:35,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 189.57142857142858) internal successors, (2654), 14 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:35,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:35:35,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:35:35,923 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 (22)] Ended with exit code 0 [2023-08-30 00:35:36,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:36,108 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:35:36,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:35:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash 258430453, now seen corresponding path program 1 times [2023-08-30 00:35:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:35:36,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669996195] [2023-08-30 00:35:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:35:36,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:36,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:35:36,112 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:35:36,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:35:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:35:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:35:36,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:35:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:36,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:35:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:36,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:35:36,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669996195] [2023-08-30 00:35:36,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669996195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:35:36,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:35:36,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:35:36,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556482868] [2023-08-30 00:35:36,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:35:36,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:35:36,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:35:36,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:35:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:35:37,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 479 [2023-08-30 00:35:37,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 75 transitions, 582 flow. Second operand has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:37,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:35:37,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 479 [2023-08-30 00:35:37,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:35:42,081 INFO L130 PetriNetUnfolder]: 21947/32033 cut-off events. [2023-08-30 00:35:42,082 INFO L131 PetriNetUnfolder]: For 80954/85769 co-relation queries the response was YES. [2023-08-30 00:35:42,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122623 conditions, 32033 events. 21947/32033 cut-off events. For 80954/85769 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 219763 event pairs, 13253 based on Foata normal form. 4369/34513 useless extension candidates. Maximal degree in co-relation 122580. Up to 23861 conditions per place. [2023-08-30 00:35:42,388 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 116 selfloop transitions, 14 changer transitions 0/136 dead transitions. [2023-08-30 00:35:42,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 136 transitions, 1158 flow [2023-08-30 00:35:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:35:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:35:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2033 transitions. [2023-08-30 00:35:42,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244258872651357 [2023-08-30 00:35:42,391 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2033 transitions. [2023-08-30 00:35:42,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2033 transitions. [2023-08-30 00:35:42,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:35:42,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2033 transitions. [2023-08-30 00:35:42,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 203.3) internal successors, (2033), 10 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:42,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:42,396 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:42,396 INFO L175 Difference]: Start difference. First operand has 123 places, 75 transitions, 582 flow. Second operand 10 states and 2033 transitions. [2023-08-30 00:35:42,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 136 transitions, 1158 flow [2023-08-30 00:35:42,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 136 transitions, 1109 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-30 00:35:42,649 INFO L231 Difference]: Finished difference. Result has 126 places, 76 transitions, 589 flow [2023-08-30 00:35:42,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=589, PETRI_PLACES=126, PETRI_TRANSITIONS=76} [2023-08-30 00:35:42,649 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 65 predicate places. [2023-08-30 00:35:42,650 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 76 transitions, 589 flow [2023-08-30 00:35:42,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:42,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:35:42,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 00:35:42,658 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 (23)] Ended with exit code 0 [2023-08-30 00:35:42,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:42,854 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:35:42,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:35:42,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1655019014, now seen corresponding path program 3 times [2023-08-30 00:35:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:35:42,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876903364] [2023-08-30 00:35:42,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:35:42,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:42,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:35:42,857 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:35:42,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:35:43,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:35:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:35:43,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:35:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:35:43,087 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:35:43,087 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 17 treesize of output 44 [2023-08-30 00:35:43,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2023-08-30 00:35:43,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:35:43,419 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 107 treesize of output 107 [2023-08-30 00:35:43,425 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 91 treesize of output 87 [2023-08-30 00:35:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:43,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:35:43,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:35:43,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:35:43,564 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 70 treesize of output 68 [2023-08-30 00:35:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:43,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:35:43,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876903364] [2023-08-30 00:35:43,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876903364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:35:43,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:35:43,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 00:35:43,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466989547] [2023-08-30 00:35:43,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:35:43,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:35:43,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:35:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:35:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:35:46,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 479 [2023-08-30 00:35:46,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 76 transitions, 589 flow. Second operand has 16 states, 16 states have (on average 186.375) internal successors, (2982), 16 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:46,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:35:46,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 479 [2023-08-30 00:35:46,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:35:52,644 INFO L130 PetriNetUnfolder]: 22994/32476 cut-off events. [2023-08-30 00:35:52,644 INFO L131 PetriNetUnfolder]: For 88692/91672 co-relation queries the response was YES. [2023-08-30 00:35:52,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137289 conditions, 32476 events. 22994/32476 cut-off events. For 88692/91672 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 219960 event pairs, 8955 based on Foata normal form. 2972/32100 useless extension candidates. Maximal degree in co-relation 137246. Up to 16753 conditions per place. [2023-08-30 00:35:52,863 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 186 selfloop transitions, 14 changer transitions 0/207 dead transitions. [2023-08-30 00:35:52,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 207 transitions, 1629 flow [2023-08-30 00:35:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:35:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:35:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2928 transitions. [2023-08-30 00:35:52,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40751565762004177 [2023-08-30 00:35:52,866 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2928 transitions. [2023-08-30 00:35:52,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2928 transitions. [2023-08-30 00:35:52,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:35:52,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2928 transitions. [2023-08-30 00:35:52,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 195.2) internal successors, (2928), 15 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:52,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:52,872 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:52,873 INFO L175 Difference]: Start difference. First operand has 126 places, 76 transitions, 589 flow. Second operand 15 states and 2928 transitions. [2023-08-30 00:35:52,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 207 transitions, 1629 flow [2023-08-30 00:35:53,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 1604 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 00:35:53,101 INFO L231 Difference]: Finished difference. Result has 140 places, 80 transitions, 655 flow [2023-08-30 00:35:53,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=655, PETRI_PLACES=140, PETRI_TRANSITIONS=80} [2023-08-30 00:35:53,102 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 79 predicate places. [2023-08-30 00:35:53,102 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 80 transitions, 655 flow [2023-08-30 00:35:53,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 186.375) internal successors, (2982), 16 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:53,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:35:53,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:35:53,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:35:53,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:53,311 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:35:53,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:35:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash 662040120, now seen corresponding path program 2 times [2023-08-30 00:35:53,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:35:53,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584459492] [2023-08-30 00:35:53,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:35:53,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:35:53,313 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:35:53,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:35:53,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:35:53,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:35:53,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:35:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:35:53,548 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:35:53,548 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 17 treesize of output 44 [2023-08-30 00:35:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:53,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:35:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:35:55,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:35:55,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584459492] [2023-08-30 00:35:55,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584459492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:35:55,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:35:55,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 00:35:55,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176828485] [2023-08-30 00:35:55,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:35:55,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:35:55,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:35:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:35:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:36:05,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 479 [2023-08-30 00:36:05,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 80 transitions, 655 flow. Second operand has 14 states, 14 states have (on average 188.71428571428572) internal successors, (2642), 14 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:05,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:36:05,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 479 [2023-08-30 00:36:05,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:36:19,347 INFO L130 PetriNetUnfolder]: 25173/36360 cut-off events. [2023-08-30 00:36:19,347 INFO L131 PetriNetUnfolder]: For 122421/127960 co-relation queries the response was YES. [2023-08-30 00:36:19,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157019 conditions, 36360 events. 25173/36360 cut-off events. For 122421/127960 co-relation queries the response was YES. Maximal size of possible extension queue 1519. Compared 247497 event pairs, 10637 based on Foata normal form. 5217/39478 useless extension candidates. Maximal degree in co-relation 156971. Up to 9536 conditions per place. [2023-08-30 00:36:19,647 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 246 selfloop transitions, 25 changer transitions 0/278 dead transitions. [2023-08-30 00:36:19,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 278 transitions, 2351 flow [2023-08-30 00:36:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:36:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:36:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3762 transitions. [2023-08-30 00:36:19,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133611691022965 [2023-08-30 00:36:19,654 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3762 transitions. [2023-08-30 00:36:19,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3762 transitions. [2023-08-30 00:36:19,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:36:19,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3762 transitions. [2023-08-30 00:36:19,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 198.0) internal successors, (3762), 19 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:19,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 479.0) internal successors, (9580), 20 states have internal predecessors, (9580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:19,662 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 479.0) internal successors, (9580), 20 states have internal predecessors, (9580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:19,662 INFO L175 Difference]: Start difference. First operand has 140 places, 80 transitions, 655 flow. Second operand 19 states and 3762 transitions. [2023-08-30 00:36:19,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 278 transitions, 2351 flow [2023-08-30 00:36:20,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 278 transitions, 2306 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-30 00:36:20,116 INFO L231 Difference]: Finished difference. Result has 155 places, 89 transitions, 768 flow [2023-08-30 00:36:20,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=768, PETRI_PLACES=155, PETRI_TRANSITIONS=89} [2023-08-30 00:36:20,117 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 94 predicate places. [2023-08-30 00:36:20,117 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 89 transitions, 768 flow [2023-08-30 00:36:20,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 188.71428571428572) internal successors, (2642), 14 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:20,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:36:20,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 00:36:20,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:36:20,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:36:20,321 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:36:20,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:36:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2058628681, now seen corresponding path program 4 times [2023-08-30 00:36:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:36:20,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500334355] [2023-08-30 00:36:20,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:36:20,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:36:20,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:36:20,323 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:36:20,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 00:36:20,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:36:20,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:36:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:36:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:36:20,537 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:36:20,538 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 17 treesize of output 44 [2023-08-30 00:36:20,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 00:36:20,971 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 79 treesize of output 75 [2023-08-30 00:36:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:36:21,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:36:21,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:36:21,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:36:21,339 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 70 treesize of output 68 [2023-08-30 00:36:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:36:22,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:36:22,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500334355] [2023-08-30 00:36:22,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500334355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:36:22,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:36:22,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:36:22,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245953821] [2023-08-30 00:36:22,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:36:22,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:36:22,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:36:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:36:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:36:31,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 479 [2023-08-30 00:36:31,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 89 transitions, 768 flow. Second operand has 18 states, 18 states have (on average 185.33333333333334) internal successors, (3336), 18 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:31,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:36:31,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 479 [2023-08-30 00:36:31,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:36:48,449 INFO L130 PetriNetUnfolder]: 30921/43945 cut-off events. [2023-08-30 00:36:48,449 INFO L131 PetriNetUnfolder]: For 267388/273701 co-relation queries the response was YES. [2023-08-30 00:36:48,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216975 conditions, 43945 events. 30921/43945 cut-off events. For 267388/273701 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 307385 event pairs, 9041 based on Foata normal form. 6323/50200 useless extension candidates. Maximal degree in co-relation 216924. Up to 13135 conditions per place. [2023-08-30 00:36:49,216 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 413 selfloop transitions, 41 changer transitions 0/463 dead transitions. [2023-08-30 00:36:49,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 463 transitions, 4051 flow [2023-08-30 00:36:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 00:36:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 00:36:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4926 transitions. [2023-08-30 00:36:49,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411356993736952 [2023-08-30 00:36:49,224 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4926 transitions. [2023-08-30 00:36:49,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4926 transitions. [2023-08-30 00:36:49,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:36:49,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4926 transitions. [2023-08-30 00:36:49,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 197.04) internal successors, (4926), 25 states have internal predecessors, (4926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:49,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 479.0) internal successors, (12454), 26 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:49,235 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 479.0) internal successors, (12454), 26 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:49,235 INFO L175 Difference]: Start difference. First operand has 155 places, 89 transitions, 768 flow. Second operand 25 states and 4926 transitions. [2023-08-30 00:36:49,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 463 transitions, 4051 flow [2023-08-30 00:36:50,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 463 transitions, 3940 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-08-30 00:36:50,104 INFO L231 Difference]: Finished difference. Result has 174 places, 110 transitions, 1052 flow [2023-08-30 00:36:50,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1052, PETRI_PLACES=174, PETRI_TRANSITIONS=110} [2023-08-30 00:36:50,105 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 113 predicate places. [2023-08-30 00:36:50,105 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 110 transitions, 1052 flow [2023-08-30 00:36:50,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 185.33333333333334) internal successors, (3336), 18 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:50,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:36:50,105 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:36:50,116 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 (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:36:50,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:36:50,317 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:36:50,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:36:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash -441930218, now seen corresponding path program 3 times [2023-08-30 00:36:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:36:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256022300] [2023-08-30 00:36:50,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:36:50,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:36:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:36:50,320 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:36:50,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 00:36:50,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:36:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:36:50,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:36:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:36:50,607 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:36:50,607 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 17 treesize of output 44 [2023-08-30 00:36:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:36:50,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:36:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:36:52,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:36:52,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256022300] [2023-08-30 00:36:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256022300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:36:52,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:36:52,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:36:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891340530] [2023-08-30 00:36:52,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:36:52,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:36:52,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:36:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:36:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:37:05,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 479 [2023-08-30 00:37:05,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 110 transitions, 1052 flow. Second operand has 24 states, 24 states have (on average 199.0) internal successors, (4776), 24 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:05,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:37:05,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 479 [2023-08-30 00:37:05,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:37:33,445 INFO L130 PetriNetUnfolder]: 57365/81069 cut-off events. [2023-08-30 00:37:33,446 INFO L131 PetriNetUnfolder]: For 502166/517285 co-relation queries the response was YES. [2023-08-30 00:37:34,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410574 conditions, 81069 events. 57365/81069 cut-off events. For 502166/517285 co-relation queries the response was YES. Maximal size of possible extension queue 2463. Compared 568403 event pairs, 41905 based on Foata normal form. 12287/93286 useless extension candidates. Maximal degree in co-relation 410520. Up to 23713 conditions per place. [2023-08-30 00:37:34,553 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 641 selfloop transitions, 24 changer transitions 0/679 dead transitions. [2023-08-30 00:37:34,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 679 transitions, 6261 flow [2023-08-30 00:37:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:37:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:37:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5287 transitions. [2023-08-30 00:37:34,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598990953375087 [2023-08-30 00:37:34,580 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5287 transitions. [2023-08-30 00:37:34,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5287 transitions. [2023-08-30 00:37:34,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:37:34,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5287 transitions. [2023-08-30 00:37:34,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 220.29166666666666) internal successors, (5287), 24 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:34,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:34,591 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:34,591 INFO L175 Difference]: Start difference. First operand has 174 places, 110 transitions, 1052 flow. Second operand 24 states and 5287 transitions. [2023-08-30 00:37:34,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 679 transitions, 6261 flow [2023-08-30 00:37:38,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 679 transitions, 6052 flow, removed 85 selfloop flow, removed 14 redundant places. [2023-08-30 00:37:38,169 INFO L231 Difference]: Finished difference. Result has 196 places, 123 transitions, 1155 flow [2023-08-30 00:37:38,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1155, PETRI_PLACES=196, PETRI_TRANSITIONS=123} [2023-08-30 00:37:38,170 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 135 predicate places. [2023-08-30 00:37:38,170 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 123 transitions, 1155 flow [2023-08-30 00:37:38,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 199.0) internal successors, (4776), 24 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:38,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:37:38,171 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:37:38,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:37:38,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:37:38,379 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:37:38,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:37:38,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1298889409, now seen corresponding path program 2 times [2023-08-30 00:37:38,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:37:38,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161945949] [2023-08-30 00:37:38,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:37:38,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:37:38,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:37:38,381 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:37:38,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 00:37:38,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:37:38,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:37:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:37:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:37:38,580 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:37:38,580 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 17 treesize of output 44 [2023-08-30 00:37:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:37:38,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:37:38,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:37:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161945949] [2023-08-30 00:37:38,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161945949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:37:38,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:37:38,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:37:38,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432601536] [2023-08-30 00:37:38,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:37:38,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:37:38,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:37:38,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:37:38,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:37:39,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-08-30 00:37:39,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 123 transitions, 1155 flow. Second operand has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 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) [2023-08-30 00:37:39,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:37:39,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-08-30 00:37:39,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:37:52,262 INFO L130 PetriNetUnfolder]: 58699/85002 cut-off events. [2023-08-30 00:37:52,262 INFO L131 PetriNetUnfolder]: For 480152/494840 co-relation queries the response was YES. [2023-08-30 00:37:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404581 conditions, 85002 events. 58699/85002 cut-off events. For 480152/494840 co-relation queries the response was YES. Maximal size of possible extension queue 2064. Compared 618227 event pairs, 39436 based on Foata normal form. 19112/103952 useless extension candidates. Maximal degree in co-relation 404517. Up to 70706 conditions per place. [2023-08-30 00:37:53,669 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 147 selfloop transitions, 21 changer transitions 0/177 dead transitions. [2023-08-30 00:37:53,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 177 transitions, 1927 flow [2023-08-30 00:37:53,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:37:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:37:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1009 transitions. [2023-08-30 00:37:53,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421294363256785 [2023-08-30 00:37:53,672 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1009 transitions. [2023-08-30 00:37:53,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1009 transitions. [2023-08-30 00:37:53,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:37:53,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1009 transitions. [2023-08-30 00:37:53,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:53,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:53,676 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:53,676 INFO L175 Difference]: Start difference. First operand has 196 places, 123 transitions, 1155 flow. Second operand 5 states and 1009 transitions. [2023-08-30 00:37:53,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 177 transitions, 1927 flow [2023-08-30 00:38:01,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 177 transitions, 1871 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-30 00:38:01,465 INFO L231 Difference]: Finished difference. Result has 190 places, 123 transitions, 1159 flow [2023-08-30 00:38:01,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1159, PETRI_PLACES=190, PETRI_TRANSITIONS=123} [2023-08-30 00:38:01,466 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 129 predicate places. [2023-08-30 00:38:01,466 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 123 transitions, 1159 flow [2023-08-30 00:38:01,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 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) [2023-08-30 00:38:01,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:38:01,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:38:01,476 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 [2023-08-30 00:38:01,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:38:01,674 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:38:01,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:38:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash 313376625, now seen corresponding path program 3 times [2023-08-30 00:38:01,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:38:01,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632274496] [2023-08-30 00:38:01,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:38:01,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:38:01,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:38:01,676 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:38:01,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 00:38:01,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:38:01,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:38:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:38:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:38:01,938 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:38:01,938 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:38:02,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 00:38:02,300 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 79 treesize of output 75 [2023-08-30 00:38:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:38:02,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:38:02,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:38:02,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:38:02,601 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 70 treesize of output 68 [2023-08-30 00:38:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:38:03,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:38:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632274496] [2023-08-30 00:38:03,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632274496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:38:03,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:38:03,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 00:38:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626437345] [2023-08-30 00:38:03,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:38:03,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:38:03,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:38:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:38:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:38:12,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 479 [2023-08-30 00:38:12,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 123 transitions, 1159 flow. Second operand has 16 states, 16 states have (on average 181.625) internal successors, (2906), 16 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:38:12,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:38:12,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 479 [2023-08-30 00:38:12,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:38:31,312 INFO L130 PetriNetUnfolder]: 52027/75250 cut-off events. [2023-08-30 00:38:31,313 INFO L131 PetriNetUnfolder]: For 724872/744549 co-relation queries the response was YES. [2023-08-30 00:38:32,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387706 conditions, 75250 events. 52027/75250 cut-off events. For 724872/744549 co-relation queries the response was YES. Maximal size of possible extension queue 1809. Compared 539567 event pairs, 17077 based on Foata normal form. 18991/94124 useless extension candidates. Maximal degree in co-relation 387640. Up to 28904 conditions per place. [2023-08-30 00:38:32,578 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 361 selfloop transitions, 32 changer transitions 0/403 dead transitions. [2023-08-30 00:38:32,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 403 transitions, 3969 flow [2023-08-30 00:38:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 00:38:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 00:38:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4018 transitions. [2023-08-30 00:38:32,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39944328462073764 [2023-08-30 00:38:32,588 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4018 transitions. [2023-08-30 00:38:32,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4018 transitions. [2023-08-30 00:38:32,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:38:32,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4018 transitions. [2023-08-30 00:38:32,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 191.33333333333334) internal successors, (4018), 21 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:38:32,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 479.0) internal successors, (10538), 22 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:38:32,611 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 479.0) internal successors, (10538), 22 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:38:32,611 INFO L175 Difference]: Start difference. First operand has 190 places, 123 transitions, 1159 flow. Second operand 21 states and 4018 transitions. [2023-08-30 00:38:32,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 403 transitions, 3969 flow [2023-08-30 00:38:37,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 403 transitions, 3850 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-08-30 00:38:37,234 INFO L231 Difference]: Finished difference. Result has 208 places, 127 transitions, 1217 flow [2023-08-30 00:38:37,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1217, PETRI_PLACES=208, PETRI_TRANSITIONS=127} [2023-08-30 00:38:37,234 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 147 predicate places. [2023-08-30 00:38:37,234 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 127 transitions, 1217 flow [2023-08-30 00:38:37,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 181.625) internal successors, (2906), 16 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:38:37,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:38:37,235 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:38:37,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 00:38:37,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:38:37,440 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:38:37,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:38:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash 370245828, now seen corresponding path program 3 times [2023-08-30 00:38:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:38:37,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483007374] [2023-08-30 00:38:37,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:38:37,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:38:37,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:38:37,442 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:38:37,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 00:38:37,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:38:37,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:38:37,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:38:37,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:38:37,686 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:38:37,686 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 17 treesize of output 44 [2023-08-30 00:38:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:38:37,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:38:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:38:39,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:38:39,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483007374] [2023-08-30 00:38:39,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483007374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:38:39,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:38:39,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:38:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068782604] [2023-08-30 00:38:39,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:38:39,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:38:39,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:38:39,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:38:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:38:49,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2023-08-30 00:38:49,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 127 transitions, 1217 flow. Second operand has 12 states, 12 states have (on average 194.0) internal successors, (2328), 12 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:38:49,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:38:49,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2023-08-30 00:38:49,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:04,702 INFO L130 PetriNetUnfolder]: 62385/90685 cut-off events. [2023-08-30 00:39:04,703 INFO L131 PetriNetUnfolder]: For 518290/535282 co-relation queries the response was YES. [2023-08-30 00:39:05,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453180 conditions, 90685 events. 62385/90685 cut-off events. For 518290/535282 co-relation queries the response was YES. Maximal size of possible extension queue 2183. Compared 673885 event pairs, 10015 based on Foata normal form. 19988/110517 useless extension candidates. Maximal degree in co-relation 453112. Up to 31046 conditions per place. [2023-08-30 00:39:06,022 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 269 selfloop transitions, 23 changer transitions 0/301 dead transitions. [2023-08-30 00:39:06,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 301 transitions, 3299 flow [2023-08-30 00:39:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:39:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:39:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1417 transitions. [2023-08-30 00:39:06,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226066209364748 [2023-08-30 00:39:06,025 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1417 transitions. [2023-08-30 00:39:06,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1417 transitions. [2023-08-30 00:39:06,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:06,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1417 transitions. [2023-08-30 00:39:06,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.42857142857142) internal successors, (1417), 7 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:06,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:06,028 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:06,028 INFO L175 Difference]: Start difference. First operand has 208 places, 127 transitions, 1217 flow. Second operand 7 states and 1417 transitions. [2023-08-30 00:39:06,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 301 transitions, 3299 flow [2023-08-30 00:39:09,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 301 transitions, 3191 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-08-30 00:39:09,780 INFO L231 Difference]: Finished difference. Result has 202 places, 127 transitions, 1220 flow [2023-08-30 00:39:09,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=202, PETRI_TRANSITIONS=127} [2023-08-30 00:39:09,780 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 141 predicate places. [2023-08-30 00:39:09,780 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 127 transitions, 1220 flow [2023-08-30 00:39:09,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 194.0) internal successors, (2328), 12 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:09,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:09,781 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 00:39:09,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-08-30 00:39:09,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:39:09,989 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:39:09,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1637588318, now seen corresponding path program 5 times [2023-08-30 00:39:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918043186] [2023-08-30 00:39:09,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:39:09,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:39:09,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:09,991 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:39:09,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 00:39:10,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 00:39:10,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:39:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:39:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:10,247 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:39:10,248 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 17 treesize of output 44 [2023-08-30 00:39:10,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 00:39:10,710 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 79 treesize of output 75 [2023-08-30 00:39:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:39:10,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:39:11,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:39:11,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:39:11,299 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 70 treesize of output 68 [2023-08-30 00:39:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:39:12,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:12,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918043186] [2023-08-30 00:39:12,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918043186] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:39:12,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:39:12,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-08-30 00:39:12,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284395618] [2023-08-30 00:39:12,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:39:12,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:39:12,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:39:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:39:23,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-08-30 00:39:23,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 127 transitions, 1220 flow. Second operand has 20 states, 20 states have (on average 182.4) internal successors, (3648), 20 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:23,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:23,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-08-30 00:39:23,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:53,003 INFO L130 PetriNetUnfolder]: 56340/81953 cut-off events. [2023-08-30 00:39:53,003 INFO L131 PetriNetUnfolder]: For 623152/641219 co-relation queries the response was YES. [2023-08-30 00:39:53,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412164 conditions, 81953 events. 56340/81953 cut-off events. For 623152/641219 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 601569 event pairs, 13175 based on Foata normal form. 16387/98270 useless extension candidates. Maximal degree in co-relation 412096. Up to 35280 conditions per place. [2023-08-30 00:39:54,186 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 588 selfloop transitions, 54 changer transitions 0/651 dead transitions. [2023-08-30 00:39:54,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 651 transitions, 6049 flow [2023-08-30 00:39:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 00:39:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 00:39:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7089 transitions. [2023-08-30 00:39:54,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39998871522879875 [2023-08-30 00:39:54,193 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7089 transitions. [2023-08-30 00:39:54,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7089 transitions. [2023-08-30 00:39:54,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:54,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7089 transitions. [2023-08-30 00:39:54,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 191.59459459459458) internal successors, (7089), 37 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:54,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 479.0) internal successors, (18202), 38 states have internal predecessors, (18202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:54,237 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 479.0) internal successors, (18202), 38 states have internal predecessors, (18202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:54,238 INFO L175 Difference]: Start difference. First operand has 202 places, 127 transitions, 1220 flow. Second operand 37 states and 7089 transitions. [2023-08-30 00:39:54,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 651 transitions, 6049 flow [2023-08-30 00:39:59,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 651 transitions, 5938 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-30 00:39:59,040 INFO L231 Difference]: Finished difference. Result has 236 places, 133 transitions, 1356 flow [2023-08-30 00:39:59,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1356, PETRI_PLACES=236, PETRI_TRANSITIONS=133} [2023-08-30 00:39:59,041 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 175 predicate places. [2023-08-30 00:39:59,041 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 133 transitions, 1356 flow [2023-08-30 00:39:59,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.4) internal successors, (3648), 20 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:59,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:59,042 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:39:59,052 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 (31)] Ended with exit code 0 [2023-08-30 00:39:59,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:39:59,250 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:39:59,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash 640261326, now seen corresponding path program 4 times [2023-08-30 00:39:59,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:59,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475600738] [2023-08-30 00:39:59,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:39:59,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:39:59,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:59,252 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:39:59,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 00:39:59,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:39:59,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:39:59,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:39:59,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:59,505 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:39:59,505 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 17 treesize of output 44 [2023-08-30 00:39:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:39:59,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:39:59,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:39:59,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:39:59,945 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 70 treesize of output 68 [2023-08-30 00:40:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:40:01,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:40:01,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475600738] [2023-08-30 00:40:01,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475600738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:40:01,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:40:01,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 00:40:01,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485163169] [2023-08-30 00:40:01,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:40:01,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:40:01,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:40:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:40:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:40:12,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-08-30 00:40:12,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 133 transitions, 1356 flow. Second operand has 22 states, 22 states have (on average 189.36363636363637) internal successors, (4166), 22 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:12,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:40:12,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-08-30 00:40:12,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:40:45,136 INFO L130 PetriNetUnfolder]: 78699/114474 cut-off events. [2023-08-30 00:40:45,136 INFO L131 PetriNetUnfolder]: For 943143/965209 co-relation queries the response was YES. [2023-08-30 00:40:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599689 conditions, 114474 events. 78699/114474 cut-off events. For 943143/965209 co-relation queries the response was YES. Maximal size of possible extension queue 2954. Compared 858349 event pairs, 28817 based on Foata normal form. 22718/137169 useless extension candidates. Maximal degree in co-relation 599618. Up to 25500 conditions per place. [2023-08-30 00:40:47,377 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 846 selfloop transitions, 65 changer transitions 0/921 dead transitions. [2023-08-30 00:40:47,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 921 transitions, 9732 flow [2023-08-30 00:40:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 00:40:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 00:40:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 8834 transitions. [2023-08-30 00:40:47,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41914974378439934 [2023-08-30 00:40:47,405 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 8834 transitions. [2023-08-30 00:40:47,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 8834 transitions. [2023-08-30 00:40:47,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:40:47,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 8834 transitions. [2023-08-30 00:40:47,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 200.77272727272728) internal successors, (8834), 44 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:47,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 479.0) internal successors, (21555), 45 states have internal predecessors, (21555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:47,423 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 479.0) internal successors, (21555), 45 states have internal predecessors, (21555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:47,423 INFO L175 Difference]: Start difference. First operand has 236 places, 133 transitions, 1356 flow. Second operand 44 states and 8834 transitions. [2023-08-30 00:40:47,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 921 transitions, 9732 flow [2023-08-30 00:40:58,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 921 transitions, 9197 flow, removed 44 selfloop flow, removed 30 redundant places. [2023-08-30 00:40:58,978 INFO L231 Difference]: Finished difference. Result has 260 places, 167 transitions, 1846 flow [2023-08-30 00:40:58,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1846, PETRI_PLACES=260, PETRI_TRANSITIONS=167} [2023-08-30 00:40:58,979 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 199 predicate places. [2023-08-30 00:40:58,979 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 167 transitions, 1846 flow [2023-08-30 00:40:58,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 189.36363636363637) internal successors, (4166), 22 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:58,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:40:58,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:40:58,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-30 00:40:59,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:40:59,183 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:40:59,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:40:59,183 INFO L85 PathProgramCache]: Analyzing trace with hash -521089833, now seen corresponding path program 5 times [2023-08-30 00:40:59,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:40:59,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862751914] [2023-08-30 00:40:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:40:59,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:40:59,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:40:59,189 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:40:59,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-30 00:40:59,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 00:40:59,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:40:59,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:40:59,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:40:59,458 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:40:59,458 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 17 treesize of output 44 [2023-08-30 00:40:59,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 00:40:59,919 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 79 treesize of output 75 [2023-08-30 00:40:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:40:59,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:41:00,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:41:00,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:41:00,243 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 70 treesize of output 68 [2023-08-30 00:41:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:41:01,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:41:01,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862751914] [2023-08-30 00:41:01,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862751914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:41:01,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:41:01,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 00:41:01,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995062519] [2023-08-30 00:41:01,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:41:01,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:41:01,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:41:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:41:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:41:12,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-08-30 00:41:12,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 167 transitions, 1846 flow. Second operand has 20 states, 20 states have (on average 182.5) internal successors, (3650), 20 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:12,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:41:12,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-08-30 00:41:12,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:41:39,149 INFO L130 PetriNetUnfolder]: 77767/113087 cut-off events. [2023-08-30 00:41:39,149 INFO L131 PetriNetUnfolder]: For 1029049/1050995 co-relation queries the response was YES. [2023-08-30 00:41:40,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616934 conditions, 113087 events. 77767/113087 cut-off events. For 1029049/1050995 co-relation queries the response was YES. Maximal size of possible extension queue 3006. Compared 847818 event pairs, 43309 based on Foata normal form. 20564/133516 useless extension candidates. Maximal degree in co-relation 616855. Up to 74069 conditions per place. [2023-08-30 00:41:41,437 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 387 selfloop transitions, 38 changer transitions 0/435 dead transitions. [2023-08-30 00:41:41,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 435 transitions, 4382 flow [2023-08-30 00:41:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:41:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:41:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4588 transitions. [2023-08-30 00:41:41,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990953375086987 [2023-08-30 00:41:41,441 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4588 transitions. [2023-08-30 00:41:41,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4588 transitions. [2023-08-30 00:41:41,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:41:41,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4588 transitions. [2023-08-30 00:41:41,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 191.16666666666666) internal successors, (4588), 24 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:41,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:41,450 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:41,450 INFO L175 Difference]: Start difference. First operand has 260 places, 167 transitions, 1846 flow. Second operand 24 states and 4588 transitions. [2023-08-30 00:41:41,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 435 transitions, 4382 flow [2023-08-30 00:41:50,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 435 transitions, 4200 flow, removed 30 selfloop flow, removed 25 redundant places. [2023-08-30 00:41:50,996 INFO L231 Difference]: Finished difference. Result has 260 places, 168 transitions, 1745 flow [2023-08-30 00:41:50,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1745, PETRI_PLACES=260, PETRI_TRANSITIONS=168} [2023-08-30 00:41:50,997 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 199 predicate places. [2023-08-30 00:41:50,997 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 168 transitions, 1745 flow [2023-08-30 00:41:50,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.5) internal successors, (3650), 20 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:50,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:41:50,998 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 00:41:51,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-08-30 00:41:51,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:41:51,206 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:41:51,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:41:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1811749082, now seen corresponding path program 6 times [2023-08-30 00:41:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:41:51,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978609261] [2023-08-30 00:41:51,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:41:51,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:41:51,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:41:51,208 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:41:51,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-08-30 00:41:51,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 00:41:51,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:41:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:41:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:41:51,515 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:41:51,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:41:51,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 00:41:51,992 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 79 treesize of output 75 [2023-08-30 00:41:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:41:52,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:41:52,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:41:52,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:41:52,369 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 70 treesize of output 68 [2023-08-30 00:41:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:41:54,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:41:54,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978609261] [2023-08-30 00:41:54,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978609261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:41:54,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:41:54,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2023-08-30 00:41:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51008674] [2023-08-30 00:41:54,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:41:54,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 00:41:54,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:41:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 00:41:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2023-08-30 00:42:15,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 479 [2023-08-30 00:42:15,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 168 transitions, 1745 flow. Second operand has 28 states, 28 states have (on average 185.21428571428572) internal successors, (5186), 28 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:42:15,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:42:15,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 479 [2023-08-30 00:42:15,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:43:20,448 INFO L130 PetriNetUnfolder]: 72476/105641 cut-off events. [2023-08-30 00:43:20,449 INFO L131 PetriNetUnfolder]: For 1177613/1199603 co-relation queries the response was YES. [2023-08-30 00:43:21,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584079 conditions, 105641 events. 72476/105641 cut-off events. For 1177613/1199603 co-relation queries the response was YES. Maximal size of possible extension queue 2591. Compared 799032 event pairs, 22467 based on Foata normal form. 21610/127195 useless extension candidates. Maximal degree in co-relation 584005. Up to 23401 conditions per place. [2023-08-30 00:43:22,499 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 1159 selfloop transitions, 105 changer transitions 0/1277 dead transitions. [2023-08-30 00:43:22,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1277 transitions, 12919 flow [2023-08-30 00:43:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 00:43:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 00:43:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 13201 transitions. [2023-08-30 00:43:22,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41133580531580094 [2023-08-30 00:43:22,508 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 13201 transitions. [2023-08-30 00:43:22,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 13201 transitions. [2023-08-30 00:43:22,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:43:22,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 13201 transitions. [2023-08-30 00:43:22,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 197.02985074626866) internal successors, (13201), 67 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:43:22,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 479.0) internal successors, (32572), 68 states have internal predecessors, (32572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:43:22,531 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 479.0) internal successors, (32572), 68 states have internal predecessors, (32572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:43:22,531 INFO L175 Difference]: Start difference. First operand has 260 places, 168 transitions, 1745 flow. Second operand 67 states and 13201 transitions. [2023-08-30 00:43:22,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1277 transitions, 12919 flow [2023-08-30 00:43:33,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1277 transitions, 12677 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-08-30 00:43:33,613 INFO L231 Difference]: Finished difference. Result has 321 places, 217 transitions, 2569 flow [2023-08-30 00:43:33,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=2569, PETRI_PLACES=321, PETRI_TRANSITIONS=217} [2023-08-30 00:43:33,614 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 260 predicate places. [2023-08-30 00:43:33,614 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 217 transitions, 2569 flow [2023-08-30 00:43:33,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 185.21428571428572) internal successors, (5186), 28 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:43:33,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:43:33,615 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 00:43:33,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2023-08-30 00:43:33,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:43:33,823 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:43:33,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:43:33,823 INFO L85 PathProgramCache]: Analyzing trace with hash 712900184, now seen corresponding path program 7 times [2023-08-30 00:43:33,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:43:33,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452193512] [2023-08-30 00:43:33,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:43:33,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:43:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:43:33,825 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:43:33,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-08-30 00:43:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:43:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:43:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:43:34,098 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:43:34,098 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 17 treesize of output 44 [2023-08-30 00:43:35,971 INFO L321 Elim1Store]: treesize reduction 320, result has 0.3 percent of original size [2023-08-30 00:43:35,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 266 treesize of output 159 [2023-08-30 00:43:35,977 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 159 treesize of output 155 [2023-08-30 00:43:35,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:43:35,995 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 167 treesize of output 167 [2023-08-30 00:43:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:43:36,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:43:36,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:43:36,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:43:36,422 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 70 treesize of output 68 [2023-08-30 00:43:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:43:37,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:43:37,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452193512] [2023-08-30 00:43:37,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452193512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:43:37,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:43:37,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:43:37,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719162343] [2023-08-30 00:43:37,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:43:37,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:43:37,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:43:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:43:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:43:49,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-08-30 00:43:49,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 217 transitions, 2569 flow. Second operand has 24 states, 24 states have (on average 182.41666666666666) internal successors, (4378), 24 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:43:49,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:43:49,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-08-30 00:43:49,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:44:22,802 INFO L130 PetriNetUnfolder]: 74288/108308 cut-off events. [2023-08-30 00:44:22,803 INFO L131 PetriNetUnfolder]: For 1314799/1337376 co-relation queries the response was YES. [2023-08-30 00:44:24,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622242 conditions, 108308 events. 74288/108308 cut-off events. For 1314799/1337376 co-relation queries the response was YES. Maximal size of possible extension queue 2741. Compared 821191 event pairs, 31014 based on Foata normal form. 22619/130790 useless extension candidates. Maximal degree in co-relation 622161. Up to 49870 conditions per place. [2023-08-30 00:44:25,168 INFO L137 encePairwiseOnDemand]: 468/479 looper letters, 732 selfloop transitions, 47 changer transitions 0/792 dead transitions. [2023-08-30 00:44:25,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 792 transitions, 8559 flow [2023-08-30 00:44:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 00:44:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 00:44:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 7298 transitions. [2023-08-30 00:44:25,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40094495110427425 [2023-08-30 00:44:25,173 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 7298 transitions. [2023-08-30 00:44:25,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 7298 transitions. [2023-08-30 00:44:25,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:44:25,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 7298 transitions. [2023-08-30 00:44:25,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 192.05263157894737) internal successors, (7298), 38 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:44:25,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 479.0) internal successors, (18681), 39 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:44:25,188 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 479.0) internal successors, (18681), 39 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:44:25,188 INFO L175 Difference]: Start difference. First operand has 321 places, 217 transitions, 2569 flow. Second operand 38 states and 7298 transitions. [2023-08-30 00:44:25,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 792 transitions, 8559 flow [2023-08-30 00:44:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 792 transitions, 8280 flow, removed 31 selfloop flow, removed 34 redundant places. [2023-08-30 00:44:36,275 INFO L231 Difference]: Finished difference. Result has 330 places, 227 transitions, 2503 flow [2023-08-30 00:44:36,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2503, PETRI_PLACES=330, PETRI_TRANSITIONS=227} [2023-08-30 00:44:36,276 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 269 predicate places. [2023-08-30 00:44:36,276 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 227 transitions, 2503 flow [2023-08-30 00:44:36,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 182.41666666666666) internal successors, (4378), 24 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:44:36,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:44:36,277 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:44:36,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2023-08-30 00:44:36,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:36,481 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 00:44:36,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:44:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash 590750260, now seen corresponding path program 6 times [2023-08-30 00:44:36,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:44:36,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551130542] [2023-08-30 00:44:36,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:44:36,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:44:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:44:36,485 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:44:36,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-08-30 00:44:36,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 00:44:36,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:44:36,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:44:36,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:44:36,880 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:44:36,880 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 17 treesize of output 44 [2023-08-30 00:44:37,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 00:44:37,442 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 79 treesize of output 75 [2023-08-30 00:44:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:44:37,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:44:37,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:44:37,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 00:44:37,719 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 70 treesize of output 68 [2023-08-30 00:44:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:44:39,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:44:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551130542] [2023-08-30 00:44:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551130542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:44:39,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:44:39,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-08-30 00:44:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110046817] [2023-08-30 00:44:39,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:44:39,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:44:39,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:44:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:44:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:44:57,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 479 [2023-08-30 00:44:57,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 227 transitions, 2503 flow. Second operand has 26 states, 26 states have (on average 185.3846153846154) internal successors, (4820), 26 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:44:57,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:44:57,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 479 [2023-08-30 00:44:57,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand