./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.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-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:50:32,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:50:32,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:50:32,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:50:32,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:50:32,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:50:32,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:50:32,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:50:32,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:50:32,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:50:32,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:50:32,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:50:32,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:50:32,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:50:32,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:50:32,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:50:32,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:50:32,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:50:32,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:50:32,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:50:32,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:50:32,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:50:32,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:50:32,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:50:32,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:50:32,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:50:32,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:50:32,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:50:32,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:50:32,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:50:32,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:50:32,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:50:32,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:50:32,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:50:32,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:50:32,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:50:32,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:50:32,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:50:32,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:50:32,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:50:32,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:50:32,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:50:32,206 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:50:32,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:50:32,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:50:32,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:50:32,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:50:32,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:50:32,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:50:32,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:50:32,208 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:50:32,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:50:32,208 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:50:32,208 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:50:32,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:50:32,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:50:32,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:50:32,209 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:50:32,209 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:50:32,209 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:50:32,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:50:32,209 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:50:32,210 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:50:32,210 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:50:32,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:50:32,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:50:32,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:50:32,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:50:32,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:50:32,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:50:32,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:50:32,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:50:32,211 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:50:32,211 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:50:32,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:50:32,211 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:50:32,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:50:32,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:50:32,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:50:32,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:50:32,542 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:50:32,543 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:50:32,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-29 23:50:33,697 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:50:33,909 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:50:33,910 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-29 23:50:33,918 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686484496/699b0fe6f5574a7789a459a41fe959bc/FLAG2e5dff38e [2023-08-29 23:50:33,932 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686484496/699b0fe6f5574a7789a459a41fe959bc [2023-08-29 23:50:33,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:50:33,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:50:33,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:50:33,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:50:33,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:50:33,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:50:33" (1/1) ... [2023-08-29 23:50:33,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d0b6bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:33, skipping insertion in model container [2023-08-29 23:50:33,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:50:33" (1/1) ... [2023-08-29 23:50:33,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:50:33,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:50:34,149 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-bad-counter-queue2.wvr.c[2271,2284] [2023-08-29 23:50:34,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:50:34,179 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:50:34,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@378450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:34, skipping insertion in model container [2023-08-29 23:50:34,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:50:34,182 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:50:34,184 INFO L158 Benchmark]: Toolchain (without parser) took 247.02ms. Allocated memory is still 73.4MB. Free memory was 50.9MB in the beginning and 41.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:50:34,185 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:50:34,185 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.07ms. Allocated memory is still 73.4MB. Free memory was 50.7MB in the beginning and 41.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:50:34,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.07ms. Allocated memory is still 73.4MB. Free memory was 50.7MB in the beginning and 41.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 90]: 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-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:50:35,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:50:35,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:50:35,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:50:35,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:50:35,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:50:35,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:50:35,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:50:35,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:50:35,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:50:35,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:50:35,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:50:35,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:50:35,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:50:35,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:50:35,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:50:35,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:50:35,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:50:35,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:50:35,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:50:35,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:50:35,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:50:35,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:50:35,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:50:35,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:50:35,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:50:35,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:50:35,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:50:35,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:50:35,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:50:35,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:50:35,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:50:35,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:50:35,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:50:35,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:50:35,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:50:35,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:50:35,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:50:35,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:50:35,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:50:35,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:50:35,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:50:35,914 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:50:35,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:50:35,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:50:35,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:50:35,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:50:35,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:50:35,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:50:35,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:50:35,917 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:50:35,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:50:35,918 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:50:35,918 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:50:35,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:50:35,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:50:35,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:50:35,919 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:50:35,919 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:50:35,919 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:50:35,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:50:35,920 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:50:35,920 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:50:35,920 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:50:35,921 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:50:35,921 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:50:35,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:50:35,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:50:35,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:50:35,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:50:35,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:50:35,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:50:35,922 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:50:35,923 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:50:35,923 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:50:35,923 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:50:35,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:50:35,923 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:50:35,924 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:50:35,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:50:36,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:50:36,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:50:36,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:50:36,266 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:50:36,268 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:50:36,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-29 23:50:37,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:50:37,754 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:50:37,755 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-29 23:50:37,766 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6e1956b/9b834fe7163a4f638365fa37e010b7fb/FLAG7536c8aa2 [2023-08-29 23:50:37,779 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6e1956b/9b834fe7163a4f638365fa37e010b7fb [2023-08-29 23:50:37,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:50:37,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:50:37,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:50:37,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:50:37,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:50:37,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:50:37" (1/1) ... [2023-08-29 23:50:37,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654c143a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:37, skipping insertion in model container [2023-08-29 23:50:37,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:50:37" (1/1) ... [2023-08-29 23:50:37,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:50:37,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:50:37,990 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-bad-counter-queue2.wvr.c[2271,2284] [2023-08-29 23:50:38,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:50:38,026 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:50:38,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:50:38,058 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-bad-counter-queue2.wvr.c[2271,2284] [2023-08-29 23:50:38,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:50:38,074 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:50:38,105 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-bad-counter-queue2.wvr.c[2271,2284] [2023-08-29 23:50:38,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:50:38,127 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:50:38,129 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:50:38,134 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:50:38,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38 WrapperNode [2023-08-29 23:50:38,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:50:38,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:50:38,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:50:38,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:50:38,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,206 INFO L138 Inliner]: procedures = 28, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 136 [2023-08-29 23:50:38,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:50:38,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:50:38,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:50:38,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:50:38,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,247 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:50:38,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:50:38,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:50:38,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:50:38,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (1/1) ... [2023-08-29 23:50:38,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:50:38,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:50:38,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:50:38,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:50:38,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:50:38,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:50:38,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:50:38,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:50:38,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:50:38,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:50:38,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:50:38,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:50:38,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:50:38,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:50:38,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:50:38,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:50:38,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:50:38,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:50:38,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:50:38,318 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:50:38,432 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:50:38,434 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:50:38,802 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:50:38,927 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:50:38,927 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 23:50:38,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:50:38 BoogieIcfgContainer [2023-08-29 23:50:38,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:50:38,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:50:38,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:50:38,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:50:38,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:50:37" (1/3) ... [2023-08-29 23:50:38,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5caeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:50:38, skipping insertion in model container [2023-08-29 23:50:38,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:38" (2/3) ... [2023-08-29 23:50:38,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5caeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:50:38, skipping insertion in model container [2023-08-29 23:50:38,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:50:38" (3/3) ... [2023-08-29 23:50:38,936 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-08-29 23:50:38,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:50:38,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-29 23:50:38,952 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:50:39,002 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:50:39,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 125 transitions, 266 flow [2023-08-29 23:50:39,098 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-08-29 23:50:39,098 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:39,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 123 events. 9/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 127 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-29 23:50:39,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 125 transitions, 266 flow [2023-08-29 23:50:39,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 119 transitions, 250 flow [2023-08-29 23:50:39,113 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:50:39,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 119 transitions, 250 flow [2023-08-29 23:50:39,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 119 transitions, 250 flow [2023-08-29 23:50:39,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 250 flow [2023-08-29 23:50:39,164 INFO L130 PetriNetUnfolder]: 9/119 cut-off events. [2023-08-29 23:50:39,164 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:39,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 119 events. 9/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-29 23:50:39,166 INFO L119 LiptonReduction]: Number of co-enabled transitions 840 [2023-08-29 23:50:49,917 INFO L134 LiptonReduction]: Checked pairs total: 1063 [2023-08-29 23:50:49,918 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-29 23:50:49,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:50:49,934 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;@17b39602, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:50:49,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-29 23:50:49,937 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:50:49,937 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:50:49,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:49,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:49,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:49,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash 18380, now seen corresponding path program 1 times [2023-08-29 23:50:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:49,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357019716] [2023-08-29 23:50:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:49,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:49,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:50,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:50:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:50:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:50,267 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:50,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:50,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:50,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357019716] [2023-08-29 23:50:50,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357019716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:50,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:50,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:50,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147058032] [2023-08-29 23:50:50,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:50,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:50,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:50,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:50,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-29 23:50:50,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:50,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:50,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-29 23:50:50,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:50,821 INFO L130 PetriNetUnfolder]: 643/938 cut-off events. [2023-08-29 23:50:50,821 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 23:50:50,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 938 events. 643/938 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 4266 event pairs, 295 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 831. Up to 468 conditions per place. [2023-08-29 23:50:50,829 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 54 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-29 23:50:50,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 252 flow [2023-08-29 23:50:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-29 23:50:50,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067204301075269 [2023-08-29 23:50:50,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-29 23:50:50,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-29 23:50:50,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:50,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-29 23:50:50,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:50,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:50,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:50,864 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 377 transitions. [2023-08-29 23:50:50,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 252 flow [2023-08-29 23:50:50,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 58 transitions, 236 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:50:50,869 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 78 flow [2023-08-29 23:50:50,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-29 23:50:50,875 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-08-29 23:50:50,876 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 78 flow [2023-08-29 23:50:50,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:50,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:50,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:50,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:51,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:51,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:51,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:51,094 INFO L85 PathProgramCache]: Analyzing trace with hash 18381, now seen corresponding path program 1 times [2023-08-29 23:50:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:51,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142207905] [2023-08-29 23:50:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:51,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:51,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:51,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:51,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:50:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:50:51,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:51,185 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:50:51,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:50:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:51,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:51,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142207905] [2023-08-29 23:50:51,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142207905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:51,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:51,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:51,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406091459] [2023-08-29 23:50:51,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:51,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:51,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:51,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-29 23:50:51,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:51,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:51,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-29 23:50:51,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:51,532 INFO L130 PetriNetUnfolder]: 653/946 cut-off events. [2023-08-29 23:50:51,533 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:51,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 946 events. 653/946 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 4267 event pairs, 298 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 949. Up to 936 conditions per place. [2023-08-29 23:50:51,539 INFO L137 encePairwiseOnDemand]: 246/248 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-29 23:50:51,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 134 flow [2023-08-29 23:50:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2023-08-29 23:50:51,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46639784946236557 [2023-08-29 23:50:51,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2023-08-29 23:50:51,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2023-08-29 23:50:51,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:51,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2023-08-29 23:50:51,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:51,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:51,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:51,551 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 78 flow. Second operand 3 states and 347 transitions. [2023-08-29 23:50:51,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 134 flow [2023-08-29 23:50:51,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:51,553 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 76 flow [2023-08-29 23:50:51,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-29 23:50:51,554 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-08-29 23:50:51,555 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 76 flow [2023-08-29 23:50:51,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:51,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:51,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:51,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:51,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:51,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:51,766 INFO L85 PathProgramCache]: Analyzing trace with hash 18422, now seen corresponding path program 1 times [2023-08-29 23:50:51,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852975638] [2023-08-29 23:50:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:51,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:51,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:51,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:51,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:50:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:51,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:50:51,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:51,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:50:51,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:50:51,878 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:50:51,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:50:51,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 23:50:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:51,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:51,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:51,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852975638] [2023-08-29 23:50:51,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852975638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:51,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:51,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316664800] [2023-08-29 23:50:51,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:51,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:52,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-29 23:50:52,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:52,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-29 23:50:52,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:52,250 INFO L130 PetriNetUnfolder]: 501/742 cut-off events. [2023-08-29 23:50:52,251 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:52,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 742 events. 501/742 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 3277 event pairs, 226 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 1487. Up to 732 conditions per place. [2023-08-29 23:50:52,254 INFO L137 encePairwiseOnDemand]: 245/248 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-29 23:50:52,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 126 flow [2023-08-29 23:50:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-29 23:50:52,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650537634408602 [2023-08-29 23:50:52,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-29 23:50:52,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-29 23:50:52,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:52,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-29 23:50:52,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,264 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 76 flow. Second operand 3 states and 346 transitions. [2023-08-29 23:50:52,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 126 flow [2023-08-29 23:50:52,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:52,266 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 73 flow [2023-08-29 23:50:52,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-29 23:50:52,267 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2023-08-29 23:50:52,267 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 73 flow [2023-08-29 23:50:52,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:52,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:52,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:52,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:52,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:52,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash 18423, now seen corresponding path program 1 times [2023-08-29 23:50:52,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:52,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209148179] [2023-08-29 23:50:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:52,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:52,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:52,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:52,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:50:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:50:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:52,568 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 23:50:52,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-29 23:50:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:52,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:52,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:52,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209148179] [2023-08-29 23:50:52,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209148179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:52,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:52,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:52,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236421613] [2023-08-29 23:50:52,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:52,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:52,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:52,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:52,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:52,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-29 23:50:52,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:52,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-29 23:50:52,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:52,840 INFO L130 PetriNetUnfolder]: 349/538 cut-off events. [2023-08-29 23:50:52,840 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:52,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 538 events. 349/538 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2307 event pairs, 154 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 1079. Up to 528 conditions per place. [2023-08-29 23:50:52,843 INFO L137 encePairwiseOnDemand]: 245/248 looper letters, 24 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-29 23:50:52,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 119 flow [2023-08-29 23:50:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-29 23:50:52,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2023-08-29 23:50:52,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-29 23:50:52,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-29 23:50:52,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:52,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-29 23:50:52,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,848 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 73 flow. Second operand 3 states and 344 transitions. [2023-08-29 23:50:52,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 119 flow [2023-08-29 23:50:52,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:52,849 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 70 flow [2023-08-29 23:50:52,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-29 23:50:52,850 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-08-29 23:50:52,850 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 70 flow [2023-08-29 23:50:52,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:52,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:52,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:50:52,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:53,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:53,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:53,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash 571234, now seen corresponding path program 1 times [2023-08-29 23:50:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:53,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962973049] [2023-08-29 23:50:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:53,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:53,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:53,064 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:53,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:50:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:53,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:50:53,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:53,189 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:53,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:53,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:50:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:53,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:53,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962973049] [2023-08-29 23:50:53,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962973049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:50:53,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:50:53,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:50:53,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404381552] [2023-08-29 23:50:53,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:50:53,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:50:53,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:50:53,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:50:53,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-29 23:50:53,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:53,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:53,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-29 23:50:53,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:54,373 INFO L130 PetriNetUnfolder]: 509/794 cut-off events. [2023-08-29 23:50:54,373 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:50:54,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 794 events. 509/794 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3763 event pairs, 229 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 1593. Up to 263 conditions per place. [2023-08-29 23:50:54,377 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 65 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2023-08-29 23:50:54,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 74 transitions, 322 flow [2023-08-29 23:50:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:50:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:50:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 681 transitions. [2023-08-29 23:50:54,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576612903225806 [2023-08-29 23:50:54,380 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 681 transitions. [2023-08-29 23:50:54,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 681 transitions. [2023-08-29 23:50:54,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:54,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 681 transitions. [2023-08-29 23:50:54,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.5) internal successors, (681), 6 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,385 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,385 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 70 flow. Second operand 6 states and 681 transitions. [2023-08-29 23:50:54,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 74 transitions, 322 flow [2023-08-29 23:50:54,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 74 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:54,386 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 123 flow [2023-08-29 23:50:54,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-29 23:50:54,387 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-08-29 23:50:54,387 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 123 flow [2023-08-29 23:50:54,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:54,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:50:54,399 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 (6)] Ended with exit code 0 [2023-08-29 23:50:54,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:54,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:54,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash 17716097, now seen corresponding path program 1 times [2023-08-29 23:50:54,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:54,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019490465] [2023-08-29 23:50:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:54,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:54,600 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:54,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:50:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:54,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:50:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:54,689 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 23:50:54,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-29 23:50:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:54,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:54,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:54,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019490465] [2023-08-29 23:50:54,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019490465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:54,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:54,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:54,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313040940] [2023-08-29 23:50:54,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:54,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:54,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:54,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 248 [2023-08-29 23:50:54,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:54,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 248 [2023-08-29 23:50:54,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:54,936 INFO L130 PetriNetUnfolder]: 480/735 cut-off events. [2023-08-29 23:50:54,936 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:50:54,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 735 events. 480/735 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3385 event pairs, 210 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 1498. Up to 720 conditions per place. [2023-08-29 23:50:54,940 INFO L137 encePairwiseOnDemand]: 245/248 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-29 23:50:54,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 175 flow [2023-08-29 23:50:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-29 23:50:54,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475806451612903 [2023-08-29 23:50:54,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-29 23:50:54,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-29 23:50:54,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:54,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-29 23:50:54,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,946 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 123 flow. Second operand 3 states and 333 transitions. [2023-08-29 23:50:54,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 175 flow [2023-08-29 23:50:54,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 165 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:54,949 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 111 flow [2023-08-29 23:50:54,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2023-08-29 23:50:54,952 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-29 23:50:54,952 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 111 flow [2023-08-29 23:50:54,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:54,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:54,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:50:54,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:55,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:55,162 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:55,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash 17716098, now seen corresponding path program 1 times [2023-08-29 23:50:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805776268] [2023-08-29 23:50:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:55,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:55,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:55,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:50:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:50:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:50:55,267 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-29 23:50:55,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-29 23:50:55,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-29 23:50:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:55,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:55,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805776268] [2023-08-29 23:50:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805776268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:55,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:55,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246476883] [2023-08-29 23:50:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:55,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:55,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-29 23:50:55,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:55,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:55,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-29 23:50:55,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:55,535 INFO L130 PetriNetUnfolder]: 435/660 cut-off events. [2023-08-29 23:50:55,535 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 23:50:55,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 660 events. 435/660 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 2926 event pairs, 189 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 1344. Up to 645 conditions per place. [2023-08-29 23:50:55,539 INFO L137 encePairwiseOnDemand]: 245/248 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-29 23:50:55,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 28 transitions, 159 flow [2023-08-29 23:50:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-29 23:50:55,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2023-08-29 23:50:55,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-29 23:50:55,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-29 23:50:55,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:55,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-29 23:50:55,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:55,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:55,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:55,543 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 111 flow. Second operand 3 states and 340 transitions. [2023-08-29 23:50:55,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 28 transitions, 159 flow [2023-08-29 23:50:55,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:55,545 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 108 flow [2023-08-29 23:50:55,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-29 23:50:55,546 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-29 23:50:55,546 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 108 flow [2023-08-29 23:50:55,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:55,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:55,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:50:55,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:55,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:55,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:55,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:55,756 INFO L85 PathProgramCache]: Analyzing trace with hash 549195310, now seen corresponding path program 1 times [2023-08-29 23:50:55,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:55,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798808270] [2023-08-29 23:50:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:55,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:55,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:55,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:55,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:50:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:55,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:50:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:55,837 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:50:55,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:50:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:55,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:55,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798808270] [2023-08-29 23:50:55,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798808270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:55,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:55,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:50:55,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093329369] [2023-08-29 23:50:55,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:55,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:50:55,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:50:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:50:55,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-29 23:50:55,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:55,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:55,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-29 23:50:55,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:56,094 INFO L130 PetriNetUnfolder]: 273/432 cut-off events. [2023-08-29 23:50:56,095 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 23:50:56,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 432 events. 273/432 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1777 event pairs, 114 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 888. Up to 413 conditions per place. [2023-08-29 23:50:56,097 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 20 selfloop transitions, 4 changer transitions 0/26 dead transitions. [2023-08-29 23:50:56,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 152 flow [2023-08-29 23:50:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:50:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:50:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2023-08-29 23:50:56,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-29 23:50:56,099 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2023-08-29 23:50:56,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2023-08-29 23:50:56,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:56,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2023-08-29 23:50:56,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,103 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,103 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 108 flow. Second operand 4 states and 428 transitions. [2023-08-29 23:50:56,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 152 flow [2023-08-29 23:50:56,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 26 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:56,104 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 111 flow [2023-08-29 23:50:56,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-29 23:50:56,105 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-29 23:50:56,105 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 111 flow [2023-08-29 23:50:56,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:56,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:50:56,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:56,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:56,314 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:56,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash 549195311, now seen corresponding path program 1 times [2023-08-29 23:50:56,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:56,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551063408] [2023-08-29 23:50:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:56,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:56,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:56,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:56,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:50:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:56,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:50:56,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:56,429 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:56,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:56,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:56,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:56,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551063408] [2023-08-29 23:50:56,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551063408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:56,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:56,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:50:56,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338580777] [2023-08-29 23:50:56,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:56,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:50:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:50:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:50:56,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-29 23:50:56,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:56,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-29 23:50:56,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:56,971 INFO L130 PetriNetUnfolder]: 372/621 cut-off events. [2023-08-29 23:50:56,972 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 23:50:56,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 621 events. 372/621 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 2945 event pairs, 123 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 1283. Up to 377 conditions per place. [2023-08-29 23:50:56,975 INFO L137 encePairwiseOnDemand]: 243/248 looper letters, 31 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-08-29 23:50:56,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 212 flow [2023-08-29 23:50:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:50:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:50:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 537 transitions. [2023-08-29 23:50:56,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43306451612903224 [2023-08-29 23:50:56,978 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 537 transitions. [2023-08-29 23:50:56,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 537 transitions. [2023-08-29 23:50:56,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:56,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 537 transitions. [2023-08-29 23:50:56,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,983 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 111 flow. Second operand 5 states and 537 transitions. [2023-08-29 23:50:56,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 212 flow [2023-08-29 23:50:56,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:50:56,984 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 126 flow [2023-08-29 23:50:56,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2023-08-29 23:50:56,985 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-29 23:50:56,985 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 126 flow [2023-08-29 23:50:56,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:56,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:56,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:50:57,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:57,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:57,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:57,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash -154811171, now seen corresponding path program 1 times [2023-08-29 23:50:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:57,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14288336] [2023-08-29 23:50:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:57,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:57,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:57,200 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:57,209 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 (11)] Waiting until timeout for monitored process [2023-08-29 23:50:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:50:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:57,318 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:57,319 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:57,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:57,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:57,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14288336] [2023-08-29 23:50:57,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14288336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:57,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:57,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:50:57,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255281177] [2023-08-29 23:50:57,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:57,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:50:57,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:57,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:50:57,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:50:57,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-29 23:50:57,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:57,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:57,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-29 23:50:57,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:58,001 INFO L130 PetriNetUnfolder]: 275/477 cut-off events. [2023-08-29 23:50:58,001 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2023-08-29 23:50:58,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 477 events. 275/477 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2122 event pairs, 150 based on Foata normal form. 8/337 useless extension candidates. Maximal degree in co-relation 1100. Up to 415 conditions per place. [2023-08-29 23:50:58,004 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 40 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-08-29 23:50:58,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 265 flow [2023-08-29 23:50:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:50:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:50:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 546 transitions. [2023-08-29 23:50:58,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403225806451613 [2023-08-29 23:50:58,006 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 546 transitions. [2023-08-29 23:50:58,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 546 transitions. [2023-08-29 23:50:58,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:58,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 546 transitions. [2023-08-29 23:50:58,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:58,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:58,010 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:58,010 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 126 flow. Second operand 5 states and 546 transitions. [2023-08-29 23:50:58,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 265 flow [2023-08-29 23:50:58,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 252 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:50:58,012 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 151 flow [2023-08-29 23:50:58,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-08-29 23:50:58,012 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-29 23:50:58,013 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 151 flow [2023-08-29 23:50:58,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:58,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:58,013 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:50:58,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:58,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:58,222 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:58,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash -160793268, now seen corresponding path program 2 times [2023-08-29 23:50:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972945211] [2023-08-29 23:50:58,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:50:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:58,224 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:58,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:50:58,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:50:58,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:50:58,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:50:58,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:58,353 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:58,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:58,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:50:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:58,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:58,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972945211] [2023-08-29 23:50:58,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972945211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:50:58,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:50:58,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:50:58,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959525478] [2023-08-29 23:50:58,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:50:58,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:50:58,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:50:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:51:01,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-29 23:51:01,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 151 flow. Second operand has 12 states, 12 states have (on average 103.0) internal successors, (1236), 12 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:01,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:01,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-29 23:51:01,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:03,695 INFO L130 PetriNetUnfolder]: 1028/1770 cut-off events. [2023-08-29 23:51:03,695 INFO L131 PetriNetUnfolder]: For 1048/1124 co-relation queries the response was YES. [2023-08-29 23:51:03,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4584 conditions, 1770 events. 1028/1770 cut-off events. For 1048/1124 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10115 event pairs, 529 based on Foata normal form. 82/1518 useless extension candidates. Maximal degree in co-relation 4562. Up to 380 conditions per place. [2023-08-29 23:51:03,707 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 158 selfloop transitions, 12 changer transitions 0/173 dead transitions. [2023-08-29 23:51:03,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 173 transitions, 972 flow [2023-08-29 23:51:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:51:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:51:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1391 transitions. [2023-08-29 23:51:03,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674059139784946 [2023-08-29 23:51:03,713 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1391 transitions. [2023-08-29 23:51:03,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1391 transitions. [2023-08-29 23:51:03,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:03,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1391 transitions. [2023-08-29 23:51:03,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.91666666666667) internal successors, (1391), 12 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,721 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,721 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 151 flow. Second operand 12 states and 1391 transitions. [2023-08-29 23:51:03,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 173 transitions, 972 flow [2023-08-29 23:51:03,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 173 transitions, 962 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 23:51:03,725 INFO L231 Difference]: Finished difference. Result has 61 places, 36 transitions, 240 flow [2023-08-29 23:51:03,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=240, PETRI_PLACES=61, PETRI_TRANSITIONS=36} [2023-08-29 23:51:03,726 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2023-08-29 23:51:03,726 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 36 transitions, 240 flow [2023-08-29 23:51:03,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 103.0) internal successors, (1236), 12 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:03,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:03,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:03,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:03,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:03,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -500343852, now seen corresponding path program 1 times [2023-08-29 23:51:03,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:03,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16634314] [2023-08-29 23:51:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:51:03,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:03,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:03,937 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:03,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:51:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:51:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:51:03,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:04,054 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:04,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:04,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:51:04,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16634314] [2023-08-29 23:51:04,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16634314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:51:04,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:51:04,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:51:04,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344324248] [2023-08-29 23:51:04,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:51:04,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:51:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:04,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:51:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:51:04,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-29 23:51:04,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 36 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:04,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:04,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-29 23:51:04,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:04,828 INFO L130 PetriNetUnfolder]: 1232/2242 cut-off events. [2023-08-29 23:51:04,828 INFO L131 PetriNetUnfolder]: For 1174/1287 co-relation queries the response was YES. [2023-08-29 23:51:04,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 2242 events. 1232/2242 cut-off events. For 1174/1287 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13798 event pairs, 633 based on Foata normal form. 113/2048 useless extension candidates. Maximal degree in co-relation 5802. Up to 1554 conditions per place. [2023-08-29 23:51:04,841 INFO L137 encePairwiseOnDemand]: 243/248 looper letters, 37 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2023-08-29 23:51:04,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 47 transitions, 366 flow [2023-08-29 23:51:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:51:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:51:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-08-29 23:51:04,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-29 23:51:04,845 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-08-29 23:51:04,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-08-29 23:51:04,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:04,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-08-29 23:51:04,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:04,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:04,849 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:04,849 INFO L175 Difference]: Start difference. First operand has 61 places, 36 transitions, 240 flow. Second operand 5 states and 535 transitions. [2023-08-29 23:51:04,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 47 transitions, 366 flow [2023-08-29 23:51:04,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 47 transitions, 341 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-29 23:51:04,853 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 243 flow [2023-08-29 23:51:04,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2023-08-29 23:51:04,855 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2023-08-29 23:51:04,855 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 243 flow [2023-08-29 23:51:04,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:04,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:04,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:04,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:05,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:05,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:05,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash -683640461, now seen corresponding path program 1 times [2023-08-29 23:51:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584881684] [2023-08-29 23:51:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:51:05,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:05,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:05,060 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:05,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:51:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:51:05,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:51:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:05,164 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:05,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:51:05,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:51:05,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:05,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584881684] [2023-08-29 23:51:05,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584881684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:05,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:05,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:51:05,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630890274] [2023-08-29 23:51:05,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:05,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:51:05,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:05,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:51:05,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:51:06,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-29 23:51:06,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 243 flow. Second operand has 10 states, 10 states have (on average 100.4) internal successors, (1004), 10 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:06,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:06,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-29 23:51:06,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:07,860 INFO L130 PetriNetUnfolder]: 2042/3565 cut-off events. [2023-08-29 23:51:07,861 INFO L131 PetriNetUnfolder]: For 3151/3564 co-relation queries the response was YES. [2023-08-29 23:51:07,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10208 conditions, 3565 events. 2042/3565 cut-off events. For 3151/3564 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23009 event pairs, 329 based on Foata normal form. 385/3805 useless extension candidates. Maximal degree in co-relation 10177. Up to 954 conditions per place. [2023-08-29 23:51:07,890 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 65 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2023-08-29 23:51:07,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 561 flow [2023-08-29 23:51:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:51:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:51:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 854 transitions. [2023-08-29 23:51:07,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43044354838709675 [2023-08-29 23:51:07,894 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 854 transitions. [2023-08-29 23:51:07,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 854 transitions. [2023-08-29 23:51:07,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:07,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 854 transitions. [2023-08-29 23:51:07,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.75) internal successors, (854), 8 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:07,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:07,900 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:07,900 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 243 flow. Second operand 8 states and 854 transitions. [2023-08-29 23:51:07,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 561 flow [2023-08-29 23:51:07,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 543 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:51:07,905 INFO L231 Difference]: Finished difference. Result has 70 places, 42 transitions, 303 flow [2023-08-29 23:51:07,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=70, PETRI_TRANSITIONS=42} [2023-08-29 23:51:07,907 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-08-29 23:51:07,907 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 42 transitions, 303 flow [2023-08-29 23:51:07,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.4) internal successors, (1004), 10 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:07,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:07,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:07,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:08,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:08,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:08,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash 270405416, now seen corresponding path program 1 times [2023-08-29 23:51:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012312757] [2023-08-29 23:51:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:51:08,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:08,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:08,123 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:08,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:51:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:51:08,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:51:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:08,265 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:08,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:51:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:51:08,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012312757] [2023-08-29 23:51:08,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012312757] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:08,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:08,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:51:08,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778826362] [2023-08-29 23:51:08,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:08,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:51:08,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:51:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:51:10,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-29 23:51:10,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 42 transitions, 303 flow. Second operand has 10 states, 10 states have (on average 100.8) internal successors, (1008), 10 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:10,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:10,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-29 23:51:10,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:11,593 INFO L130 PetriNetUnfolder]: 4157/6805 cut-off events. [2023-08-29 23:51:11,593 INFO L131 PetriNetUnfolder]: For 11097/11343 co-relation queries the response was YES. [2023-08-29 23:51:11,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23593 conditions, 6805 events. 4157/6805 cut-off events. For 11097/11343 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 43198 event pairs, 867 based on Foata normal form. 930/7699 useless extension candidates. Maximal degree in co-relation 23558. Up to 2112 conditions per place. [2023-08-29 23:51:11,637 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 86 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2023-08-29 23:51:11,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 839 flow [2023-08-29 23:51:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:51:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:51:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 850 transitions. [2023-08-29 23:51:11,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284274193548387 [2023-08-29 23:51:11,642 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 850 transitions. [2023-08-29 23:51:11,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 850 transitions. [2023-08-29 23:51:11,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:11,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 850 transitions. [2023-08-29 23:51:11,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.25) internal successors, (850), 8 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:11,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:11,648 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 248.0) internal successors, (2232), 9 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:11,648 INFO L175 Difference]: Start difference. First operand has 70 places, 42 transitions, 303 flow. Second operand 8 states and 850 transitions. [2023-08-29 23:51:11,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 839 flow [2023-08-29 23:51:11,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 785 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-29 23:51:11,659 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 368 flow [2023-08-29 23:51:11,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=368, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2023-08-29 23:51:11,660 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2023-08-29 23:51:11,661 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 368 flow [2023-08-29 23:51:11,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.8) internal successors, (1008), 10 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:11,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:11,662 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:11,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:11,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:11,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash 405292377, now seen corresponding path program 2 times [2023-08-29 23:51:11,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:11,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275688658] [2023-08-29 23:51:11,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:51:11,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:11,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:11,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:11,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 23:51:11,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:51:11,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:51:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:51:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:12,010 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:12,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:12,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:13,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:13,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275688658] [2023-08-29 23:51:13,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275688658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:13,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:13,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 23:51:13,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53844940] [2023-08-29 23:51:13,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:13,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:51:13,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:51:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:51:18,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 248 [2023-08-29 23:51:18,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 368 flow. Second operand has 17 states, 17 states have (on average 98.17647058823529) internal successors, (1669), 17 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:18,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:18,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 248 [2023-08-29 23:51:18,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:22,982 INFO L130 PetriNetUnfolder]: 4087/6825 cut-off events. [2023-08-29 23:51:22,983 INFO L131 PetriNetUnfolder]: For 22744/23453 co-relation queries the response was YES. [2023-08-29 23:51:23,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28162 conditions, 6825 events. 4087/6825 cut-off events. For 22744/23453 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 44612 event pairs, 2009 based on Foata normal form. 762/7586 useless extension candidates. Maximal degree in co-relation 28123. Up to 4270 conditions per place. [2023-08-29 23:51:23,027 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 211 selfloop transitions, 25 changer transitions 0/237 dead transitions. [2023-08-29 23:51:23,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 237 transitions, 2031 flow [2023-08-29 23:51:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:51:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:51:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1906 transitions. [2023-08-29 23:51:23,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42697132616487454 [2023-08-29 23:51:23,035 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1906 transitions. [2023-08-29 23:51:23,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1906 transitions. [2023-08-29 23:51:23,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:23,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1906 transitions. [2023-08-29 23:51:23,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 105.88888888888889) internal successors, (1906), 18 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:23,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:23,046 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:23,046 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 368 flow. Second operand 18 states and 1906 transitions. [2023-08-29 23:51:23,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 237 transitions, 2031 flow [2023-08-29 23:51:23,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 237 transitions, 1924 flow, removed 44 selfloop flow, removed 3 redundant places. [2023-08-29 23:51:23,071 INFO L231 Difference]: Finished difference. Result has 98 places, 62 transitions, 567 flow [2023-08-29 23:51:23,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=567, PETRI_PLACES=98, PETRI_TRANSITIONS=62} [2023-08-29 23:51:23,072 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 62 predicate places. [2023-08-29 23:51:23,072 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 62 transitions, 567 flow [2023-08-29 23:51:23,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.17647058823529) internal successors, (1669), 17 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:23,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:23,073 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:23,084 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 (16)] Ended with exit code 0 [2023-08-29 23:51:23,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:23,287 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:23,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1708510082, now seen corresponding path program 2 times [2023-08-29 23:51:23,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:23,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43223795] [2023-08-29 23:51:23,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:51:23,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:23,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:23,290 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:23,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 23:51:23,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:51:23,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:51:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:51:23,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:23,485 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:23,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:23,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:24,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43223795] [2023-08-29 23:51:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43223795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:24,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:24,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 23:51:24,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305474445] [2023-08-29 23:51:24,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:24,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:51:24,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:24,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:51:24,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:51:30,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 248 [2023-08-29 23:51:30,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 62 transitions, 567 flow. Second operand has 17 states, 17 states have (on average 98.41176470588235) internal successors, (1673), 17 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:30,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:30,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 248 [2023-08-29 23:51:30,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:34,617 INFO L130 PetriNetUnfolder]: 4390/7580 cut-off events. [2023-08-29 23:51:34,618 INFO L131 PetriNetUnfolder]: For 23650/23938 co-relation queries the response was YES. [2023-08-29 23:51:34,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32362 conditions, 7580 events. 4390/7580 cut-off events. For 23650/23938 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 52094 event pairs, 2304 based on Foata normal form. 336/7881 useless extension candidates. Maximal degree in co-relation 32317. Up to 4456 conditions per place. [2023-08-29 23:51:34,714 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 182 selfloop transitions, 22 changer transitions 0/208 dead transitions. [2023-08-29 23:51:34,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 208 transitions, 1793 flow [2023-08-29 23:51:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:51:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:51:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1889 transitions. [2023-08-29 23:51:34,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42316308243727596 [2023-08-29 23:51:34,723 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1889 transitions. [2023-08-29 23:51:34,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1889 transitions. [2023-08-29 23:51:34,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:34,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1889 transitions. [2023-08-29 23:51:34,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.94444444444444) internal successors, (1889), 18 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:34,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:34,750 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:34,750 INFO L175 Difference]: Start difference. First operand has 98 places, 62 transitions, 567 flow. Second operand 18 states and 1889 transitions. [2023-08-29 23:51:34,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 208 transitions, 1793 flow [2023-08-29 23:51:34,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 208 transitions, 1716 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-29 23:51:34,797 INFO L231 Difference]: Finished difference. Result has 112 places, 69 transitions, 641 flow [2023-08-29 23:51:34,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=641, PETRI_PLACES=112, PETRI_TRANSITIONS=69} [2023-08-29 23:51:34,799 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 76 predicate places. [2023-08-29 23:51:34,799 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 69 transitions, 641 flow [2023-08-29 23:51:34,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.41176470588235) internal successors, (1673), 17 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:34,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:34,800 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-29 23:51:34,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:35,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:35,010 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:35,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1894591517, now seen corresponding path program 3 times [2023-08-29 23:51:35,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:35,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767995345] [2023-08-29 23:51:35,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:51:35,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:35,013 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:35,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 23:51:35,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 23:51:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:51:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:51:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:35,249 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:35,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:51:35,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:51:35,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:35,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767995345] [2023-08-29 23:51:35,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767995345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:35,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:35,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-29 23:51:35,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327924256] [2023-08-29 23:51:35,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:35,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:51:35,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:35,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:51:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:51:38,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-29 23:51:38,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 69 transitions, 641 flow. Second operand has 16 states, 16 states have (on average 97.25) internal successors, (1556), 16 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:38,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:38,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-29 23:51:38,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:40,902 INFO L130 PetriNetUnfolder]: 3795/6518 cut-off events. [2023-08-29 23:51:40,902 INFO L131 PetriNetUnfolder]: For 29776/30555 co-relation queries the response was YES. [2023-08-29 23:51:40,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29559 conditions, 6518 events. 3795/6518 cut-off events. For 29776/30555 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 43896 event pairs, 2493 based on Foata normal form. 647/7139 useless extension candidates. Maximal degree in co-relation 29511. Up to 5623 conditions per place. [2023-08-29 23:51:40,937 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 158 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2023-08-29 23:51:40,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 178 transitions, 1698 flow [2023-08-29 23:51:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:51:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:51:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1552 transitions. [2023-08-29 23:51:40,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172043010752688 [2023-08-29 23:51:40,943 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1552 transitions. [2023-08-29 23:51:40,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1552 transitions. [2023-08-29 23:51:40,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:40,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1552 transitions. [2023-08-29 23:51:40,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 103.46666666666667) internal successors, (1552), 15 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:40,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:40,951 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:40,951 INFO L175 Difference]: Start difference. First operand has 112 places, 69 transitions, 641 flow. Second operand 15 states and 1552 transitions. [2023-08-29 23:51:40,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 178 transitions, 1698 flow [2023-08-29 23:51:41,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 178 transitions, 1635 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-29 23:51:41,008 INFO L231 Difference]: Finished difference. Result has 126 places, 72 transitions, 690 flow [2023-08-29 23:51:41,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=690, PETRI_PLACES=126, PETRI_TRANSITIONS=72} [2023-08-29 23:51:41,009 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 90 predicate places. [2023-08-29 23:51:41,009 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 72 transitions, 690 flow [2023-08-29 23:51:41,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 97.25) internal successors, (1556), 16 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:41,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:41,010 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:51:41,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:41,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:41,221 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:41,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash 571286924, now seen corresponding path program 3 times [2023-08-29 23:51:41,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:41,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883131655] [2023-08-29 23:51:41,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:51:41,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:41,223 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:41,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 23:51:41,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:51:41,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:51:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:51:41,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:41,462 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:41,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:41,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:43,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:43,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883131655] [2023-08-29 23:51:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883131655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:43,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:43,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:51:43,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326513176] [2023-08-29 23:51:43,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:43,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:51:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:51:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:51:52,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-29 23:51:52,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 72 transitions, 690 flow. Second operand has 24 states, 24 states have (on average 102.0) internal successors, (2448), 24 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:52,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:52,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-29 23:51:52,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:52:10,217 INFO L130 PetriNetUnfolder]: 8811/14758 cut-off events. [2023-08-29 23:52:10,218 INFO L131 PetriNetUnfolder]: For 69046/71307 co-relation queries the response was YES. [2023-08-29 23:52:10,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67194 conditions, 14758 events. 8811/14758 cut-off events. For 69046/71307 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 100620 event pairs, 6227 based on Foata normal form. 1768/16443 useless extension candidates. Maximal degree in co-relation 67141. Up to 3177 conditions per place. [2023-08-29 23:52:10,336 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 566 selfloop transitions, 25 changer transitions 0/600 dead transitions. [2023-08-29 23:52:10,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 600 transitions, 5651 flow [2023-08-29 23:52:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-29 23:52:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-29 23:52:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2886 transitions. [2023-08-29 23:52:10,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4654838709677419 [2023-08-29 23:52:10,342 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2886 transitions. [2023-08-29 23:52:10,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2886 transitions. [2023-08-29 23:52:10,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:52:10,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2886 transitions. [2023-08-29 23:52:10,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 115.44) internal successors, (2886), 25 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:10,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:10,353 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:10,353 INFO L175 Difference]: Start difference. First operand has 126 places, 72 transitions, 690 flow. Second operand 25 states and 2886 transitions. [2023-08-29 23:52:10,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 600 transitions, 5651 flow [2023-08-29 23:52:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 600 transitions, 5631 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 23:52:10,555 INFO L231 Difference]: Finished difference. Result has 144 places, 85 transitions, 813 flow [2023-08-29 23:52:10,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=813, PETRI_PLACES=144, PETRI_TRANSITIONS=85} [2023-08-29 23:52:10,556 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 108 predicate places. [2023-08-29 23:52:10,556 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 85 transitions, 813 flow [2023-08-29 23:52:10,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 102.0) internal successors, (2448), 24 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:10,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:52:10,557 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2023-08-29 23:52:10,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-29 23:52:10,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:10,762 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:52:10,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:52:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1853331507, now seen corresponding path program 4 times [2023-08-29 23:52:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:52:10,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300489641] [2023-08-29 23:52:10,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:52:10,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:10,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:52:10,769 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:52:10,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 23:52:10,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:52:10,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:52:10,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 23:52:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:52:10,946 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:52:10,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:52:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:52:11,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:52:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:52:12,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:52:12,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300489641] [2023-08-29 23:52:12,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300489641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:52:12,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:52:12,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2023-08-29 23:52:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018126733] [2023-08-29 23:52:12,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:52:12,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 23:52:12,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:52:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 23:52:12,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-08-29 23:52:21,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-29 23:52:21,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 85 transitions, 813 flow. Second operand has 22 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:21,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:52:21,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-29 23:52:21,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:52:27,197 INFO L130 PetriNetUnfolder]: 8930/14906 cut-off events. [2023-08-29 23:52:27,197 INFO L131 PetriNetUnfolder]: For 71051/72858 co-relation queries the response was YES. [2023-08-29 23:52:27,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68141 conditions, 14906 events. 8930/14906 cut-off events. For 71051/72858 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 101427 event pairs, 5422 based on Foata normal form. 1379/16211 useless extension candidates. Maximal degree in co-relation 68087. Up to 12802 conditions per place. [2023-08-29 23:52:27,295 INFO L137 encePairwiseOnDemand]: 241/248 looper letters, 268 selfloop transitions, 37 changer transitions 0/309 dead transitions. [2023-08-29 23:52:27,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 309 transitions, 2908 flow [2023-08-29 23:52:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:52:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:52:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2501 transitions. [2023-08-29 23:52:27,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42019489247311825 [2023-08-29 23:52:27,299 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2501 transitions. [2023-08-29 23:52:27,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2501 transitions. [2023-08-29 23:52:27,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:52:27,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2501 transitions. [2023-08-29 23:52:27,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 104.20833333333333) internal successors, (2501), 24 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:27,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:27,309 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:27,310 INFO L175 Difference]: Start difference. First operand has 144 places, 85 transitions, 813 flow. Second operand 24 states and 2501 transitions. [2023-08-29 23:52:27,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 309 transitions, 2908 flow [2023-08-29 23:52:27,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 309 transitions, 2826 flow, removed 24 selfloop flow, removed 17 redundant places. [2023-08-29 23:52:27,451 INFO L231 Difference]: Finished difference. Result has 151 places, 97 transitions, 1014 flow [2023-08-29 23:52:27,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1014, PETRI_PLACES=151, PETRI_TRANSITIONS=97} [2023-08-29 23:52:27,452 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 115 predicate places. [2023-08-29 23:52:27,452 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 97 transitions, 1014 flow [2023-08-29 23:52:27,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:27,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:52:27,453 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-08-29 23:52:27,461 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 [2023-08-29 23:52:27,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:27,656 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:52:27,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:52:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1644043217, now seen corresponding path program 5 times [2023-08-29 23:52:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:52:27,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320231599] [2023-08-29 23:52:27,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:52:27,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:27,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:52:27,658 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:52:27,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 23:52:27,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:52:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:52:27,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:52:27,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:52:27,860 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:52:27,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:52:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:52:28,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:52:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:52:29,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:52:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320231599] [2023-08-29 23:52:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320231599] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:52:29,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:52:29,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 23:52:29,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990525667] [2023-08-29 23:52:29,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:52:29,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:52:29,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:52:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:52:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:52:33,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-29 23:52:33,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 97 transitions, 1014 flow. Second operand has 16 states, 16 states have (on average 100.25) internal successors, (1604), 16 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:33,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:52:33,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-29 23:52:33,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:52:43,584 INFO L130 PetriNetUnfolder]: 19064/32726 cut-off events. [2023-08-29 23:52:43,585 INFO L131 PetriNetUnfolder]: For 199681/204444 co-relation queries the response was YES. [2023-08-29 23:52:43,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146196 conditions, 32726 events. 19064/32726 cut-off events. For 199681/204444 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 264895 event pairs, 1244 based on Foata normal form. 5723/38407 useless extension candidates. Maximal degree in co-relation 146146. Up to 7513 conditions per place. [2023-08-29 23:52:43,933 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 249 selfloop transitions, 34 changer transitions 0/287 dead transitions. [2023-08-29 23:52:43,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 287 transitions, 3157 flow [2023-08-29 23:52:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:52:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:52:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1527 transitions. [2023-08-29 23:52:43,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398041474654378 [2023-08-29 23:52:43,936 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1527 transitions. [2023-08-29 23:52:43,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1527 transitions. [2023-08-29 23:52:43,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:52:43,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1527 transitions. [2023-08-29 23:52:43,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 109.07142857142857) internal successors, (1527), 14 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:43,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:43,940 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:43,940 INFO L175 Difference]: Start difference. First operand has 151 places, 97 transitions, 1014 flow. Second operand 14 states and 1527 transitions. [2023-08-29 23:52:43,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 287 transitions, 3157 flow [2023-08-29 23:52:44,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 287 transitions, 3020 flow, removed 33 selfloop flow, removed 22 redundant places. [2023-08-29 23:52:44,314 INFO L231 Difference]: Finished difference. Result has 149 places, 104 transitions, 1030 flow [2023-08-29 23:52:44,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1030, PETRI_PLACES=149, PETRI_TRANSITIONS=104} [2023-08-29 23:52:44,315 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 113 predicate places. [2023-08-29 23:52:44,315 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 104 transitions, 1030 flow [2023-08-29 23:52:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.25) internal successors, (1604), 16 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:44,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:52:44,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:52:44,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-08-29 23:52:44,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:44,516 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:52:44,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:52:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1591704402, now seen corresponding path program 3 times [2023-08-29 23:52:44,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:52:44,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824716505] [2023-08-29 23:52:44,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:52:44,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:44,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:52:44,517 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:52:44,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 23:52:44,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 23:52:44,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:52:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:52:44,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:52:44,781 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:52:44,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:52:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:52:45,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:52:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:52:45,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:52:45,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824716505] [2023-08-29 23:52:45,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824716505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:52:45,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:52:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-29 23:52:45,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880798026] [2023-08-29 23:52:45,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:52:45,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:52:45,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:52:45,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:52:45,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:52:47,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-29 23:52:47,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 104 transitions, 1030 flow. Second operand has 16 states, 16 states have (on average 97.5) internal successors, (1560), 16 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:47,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:52:47,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-29 23:52:47,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:52:54,536 INFO L130 PetriNetUnfolder]: 20150/34630 cut-off events. [2023-08-29 23:52:54,536 INFO L131 PetriNetUnfolder]: For 189811/190713 co-relation queries the response was YES. [2023-08-29 23:52:54,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164920 conditions, 34630 events. 20150/34630 cut-off events. For 189811/190713 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 269653 event pairs, 15478 based on Foata normal form. 778/35332 useless extension candidates. Maximal degree in co-relation 164869. Up to 33849 conditions per place. [2023-08-29 23:52:55,045 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 151 selfloop transitions, 18 changer transitions 0/174 dead transitions. [2023-08-29 23:52:55,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 174 transitions, 1677 flow [2023-08-29 23:52:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:52:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:52:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1542 transitions. [2023-08-29 23:52:55,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41451612903225804 [2023-08-29 23:52:55,048 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1542 transitions. [2023-08-29 23:52:55,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1542 transitions. [2023-08-29 23:52:55,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:52:55,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1542 transitions. [2023-08-29 23:52:55,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.8) internal successors, (1542), 15 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:55,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:55,054 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:55,054 INFO L175 Difference]: Start difference. First operand has 149 places, 104 transitions, 1030 flow. Second operand 15 states and 1542 transitions. [2023-08-29 23:52:55,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 174 transitions, 1677 flow [2023-08-29 23:52:55,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 174 transitions, 1595 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-29 23:52:55,475 INFO L231 Difference]: Finished difference. Result has 161 places, 103 transitions, 1017 flow [2023-08-29 23:52:55,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1017, PETRI_PLACES=161, PETRI_TRANSITIONS=103} [2023-08-29 23:52:55,475 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 125 predicate places. [2023-08-29 23:52:55,475 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 103 transitions, 1017 flow [2023-08-29 23:52:55,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 97.5) internal successors, (1560), 16 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:55,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:52:55,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:52:55,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 23:52:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:55,676 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:52:55,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:52:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1813665328, now seen corresponding path program 1 times [2023-08-29 23:52:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:52:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843098628] [2023-08-29 23:52:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:52:55,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:52:55,685 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:52:55,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 23:52:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:52:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:52:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:52:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:52:55,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:52:55,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:52:55,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843098628] [2023-08-29 23:52:55,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843098628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:52:55,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:52:55,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:52:55,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430517568] [2023-08-29 23:52:55,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:52:55,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:52:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:52:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:52:55,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:52:55,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 248 [2023-08-29 23:52:55,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 103 transitions, 1017 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:55,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:52:55,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 248 [2023-08-29 23:52:55,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:53:00,281 INFO L130 PetriNetUnfolder]: 18496/31788 cut-off events. [2023-08-29 23:53:00,281 INFO L131 PetriNetUnfolder]: For 172643/177786 co-relation queries the response was YES. [2023-08-29 23:53:00,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145847 conditions, 31788 events. 18496/31788 cut-off events. For 172643/177786 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 254257 event pairs, 7662 based on Foata normal form. 3971/35593 useless extension candidates. Maximal degree in co-relation 145792. Up to 30941 conditions per place. [2023-08-29 23:53:00,546 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 94 selfloop transitions, 13 changer transitions 4/119 dead transitions. [2023-08-29 23:53:00,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 119 transitions, 1372 flow [2023-08-29 23:53:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:53:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:53:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-29 23:53:00,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48655913978494625 [2023-08-29 23:53:00,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-29 23:53:00,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-29 23:53:00,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:53:00,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-29 23:53:00,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:00,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:00,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:00,549 INFO L175 Difference]: Start difference. First operand has 161 places, 103 transitions, 1017 flow. Second operand 3 states and 362 transitions. [2023-08-29 23:53:00,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 119 transitions, 1372 flow [2023-08-29 23:53:01,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 119 transitions, 1345 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-29 23:53:01,057 INFO L231 Difference]: Finished difference. Result has 157 places, 108 transitions, 1120 flow [2023-08-29 23:53:01,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1120, PETRI_PLACES=157, PETRI_TRANSITIONS=108} [2023-08-29 23:53:01,058 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 121 predicate places. [2023-08-29 23:53:01,058 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 108 transitions, 1120 flow [2023-08-29 23:53:01,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:01,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:53:01,058 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:53:01,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 23:53:01,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:53:01,265 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:53:01,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:53:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 269972948, now seen corresponding path program 4 times [2023-08-29 23:53:01,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:53:01,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052889545] [2023-08-29 23:53:01,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:53:01,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:53:01,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:53:01,267 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:53:01,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-29 23:53:01,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:53:01,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:53:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:53:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:53:01,445 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:53:01,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:53:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:53:01,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:53:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:53:02,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:53:02,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052889545] [2023-08-29 23:53:02,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052889545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:53:02,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:53:02,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 23:53:02,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045203086] [2023-08-29 23:53:02,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:53:02,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:53:02,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:53:02,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:53:02,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:53:07,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-29 23:53:07,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 108 transitions, 1120 flow. Second operand has 16 states, 16 states have (on average 100.5) internal successors, (1608), 16 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:07,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:53:07,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-29 23:53:07,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:53:24,133 INFO L130 PetriNetUnfolder]: 40371/73088 cut-off events. [2023-08-29 23:53:24,133 INFO L131 PetriNetUnfolder]: For 302965/303867 co-relation queries the response was YES. [2023-08-29 23:53:24,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343796 conditions, 73088 events. 40371/73088 cut-off events. For 302965/303867 co-relation queries the response was YES. Maximal size of possible extension queue 1652. Compared 684760 event pairs, 4645 based on Foata normal form. 8030/81040 useless extension candidates. Maximal degree in co-relation 343740. Up to 14261 conditions per place. [2023-08-29 23:53:25,214 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 328 selfloop transitions, 48 changer transitions 0/380 dead transitions. [2023-08-29 23:53:25,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 380 transitions, 4126 flow [2023-08-29 23:53:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:53:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:53:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1509 transitions. [2023-08-29 23:53:25,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346198156682028 [2023-08-29 23:53:25,217 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1509 transitions. [2023-08-29 23:53:25,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1509 transitions. [2023-08-29 23:53:25,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:53:25,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1509 transitions. [2023-08-29 23:53:25,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 107.78571428571429) internal successors, (1509), 14 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:25,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:25,228 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:25,228 INFO L175 Difference]: Start difference. First operand has 157 places, 108 transitions, 1120 flow. Second operand 14 states and 1509 transitions. [2023-08-29 23:53:25,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 380 transitions, 4126 flow [2023-08-29 23:53:26,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 380 transitions, 4104 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 23:53:26,669 INFO L231 Difference]: Finished difference. Result has 168 places, 120 transitions, 1427 flow [2023-08-29 23:53:26,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1427, PETRI_PLACES=168, PETRI_TRANSITIONS=120} [2023-08-29 23:53:26,670 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 132 predicate places. [2023-08-29 23:53:26,670 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 120 transitions, 1427 flow [2023-08-29 23:53:26,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.5) internal successors, (1608), 16 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:26,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:53:26,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:53:26,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-29 23:53:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:53:26,871 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:53:26,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:53:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2115420090, now seen corresponding path program 1 times [2023-08-29 23:53:26,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:53:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885867613] [2023-08-29 23:53:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:53:26,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:53:26,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:53:26,873 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:53:26,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-29 23:53:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:53:26,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:53:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:53:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:53:27,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:53:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:53:27,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:53:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885867613] [2023-08-29 23:53:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885867613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:53:27,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:53:27,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-29 23:53:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641152133] [2023-08-29 23:53:27,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:53:27,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:53:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:53:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:53:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:53:27,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-29 23:53:27,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 120 transitions, 1427 flow. Second operand has 11 states, 11 states have (on average 104.72727272727273) internal successors, (1152), 11 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:27,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:53:27,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-29 23:53:27,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:53:40,124 INFO L130 PetriNetUnfolder]: 42543/76619 cut-off events. [2023-08-29 23:53:40,124 INFO L131 PetriNetUnfolder]: For 809988/809988 co-relation queries the response was YES. [2023-08-29 23:53:40,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405578 conditions, 76619 events. 42543/76619 cut-off events. For 809988/809988 co-relation queries the response was YES. Maximal size of possible extension queue 1709. Compared 734984 event pairs, 509 based on Foata normal form. 1164/77783 useless extension candidates. Maximal degree in co-relation 405514. Up to 55870 conditions per place. [2023-08-29 23:53:41,355 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 237 selfloop transitions, 61 changer transitions 0/298 dead transitions. [2023-08-29 23:53:41,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 298 transitions, 4374 flow [2023-08-29 23:53:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:53:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:53:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1416 transitions. [2023-08-29 23:53:41,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392059553349876 [2023-08-29 23:53:41,359 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1416 transitions. [2023-08-29 23:53:41,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1416 transitions. [2023-08-29 23:53:41,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:53:41,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1416 transitions. [2023-08-29 23:53:41,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 108.92307692307692) internal successors, (1416), 13 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:41,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:41,364 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:41,364 INFO L175 Difference]: Start difference. First operand has 168 places, 120 transitions, 1427 flow. Second operand 13 states and 1416 transitions. [2023-08-29 23:53:41,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 298 transitions, 4374 flow [2023-08-29 23:53:43,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 298 transitions, 3921 flow, removed 138 selfloop flow, removed 6 redundant places. [2023-08-29 23:53:43,989 INFO L231 Difference]: Finished difference. Result has 180 places, 168 transitions, 2255 flow [2023-08-29 23:53:43,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2255, PETRI_PLACES=180, PETRI_TRANSITIONS=168} [2023-08-29 23:53:43,990 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 144 predicate places. [2023-08-29 23:53:43,990 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 168 transitions, 2255 flow [2023-08-29 23:53:43,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.72727272727273) internal successors, (1152), 11 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:43,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:53:43,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:53:43,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-29 23:53:44,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:53:44,192 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:53:44,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:53:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash -285066566, now seen corresponding path program 1 times [2023-08-29 23:53:44,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:53:44,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923592057] [2023-08-29 23:53:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:53:44,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:53:44,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:53:44,194 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:53:44,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-29 23:53:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:53:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:53:44,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:53:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:53:44,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:53:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:53:44,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:53:44,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923592057] [2023-08-29 23:53:44,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923592057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:53:44,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:53:44,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-29 23:53:44,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797186653] [2023-08-29 23:53:44,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:53:44,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:53:44,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:53:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:53:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:53:44,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-29 23:53:44,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 168 transitions, 2255 flow. Second operand has 11 states, 11 states have (on average 104.54545454545455) internal successors, (1150), 11 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:44,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:53:44,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-29 23:53:44,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:53:58,265 INFO L130 PetriNetUnfolder]: 43614/78364 cut-off events. [2023-08-29 23:53:58,266 INFO L131 PetriNetUnfolder]: For 482167/482167 co-relation queries the response was YES. [2023-08-29 23:53:59,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400764 conditions, 78364 events. 43614/78364 cut-off events. For 482167/482167 co-relation queries the response was YES. Maximal size of possible extension queue 1749. Compared 723734 event pairs, 2232 based on Foata normal form. 854/79218 useless extension candidates. Maximal degree in co-relation 400694. Up to 55746 conditions per place. [2023-08-29 23:53:59,428 INFO L137 encePairwiseOnDemand]: 240/248 looper letters, 238 selfloop transitions, 100 changer transitions 0/338 dead transitions. [2023-08-29 23:53:59,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 338 transitions, 4760 flow [2023-08-29 23:53:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:53:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:53:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1406 transitions. [2023-08-29 23:53:59,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43610421836228286 [2023-08-29 23:53:59,430 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1406 transitions. [2023-08-29 23:53:59,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1406 transitions. [2023-08-29 23:53:59,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:53:59,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1406 transitions. [2023-08-29 23:53:59,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 108.15384615384616) internal successors, (1406), 13 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:59,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:59,435 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:59,435 INFO L175 Difference]: Start difference. First operand has 180 places, 168 transitions, 2255 flow. Second operand 13 states and 1406 transitions. [2023-08-29 23:53:59,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 338 transitions, 4760 flow [2023-08-29 23:54:06,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 338 transitions, 4432 flow, removed 102 selfloop flow, removed 3 redundant places. [2023-08-29 23:54:06,145 INFO L231 Difference]: Finished difference. Result has 195 places, 210 transitions, 3012 flow [2023-08-29 23:54:06,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3012, PETRI_PLACES=195, PETRI_TRANSITIONS=210} [2023-08-29 23:54:06,146 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 159 predicate places. [2023-08-29 23:54:06,146 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 210 transitions, 3012 flow [2023-08-29 23:54:06,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.54545454545455) internal successors, (1150), 11 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:06,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:06,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:54:06,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-29 23:54:06,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:06,347 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:54:06,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:06,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1060096874, now seen corresponding path program 2 times [2023-08-29 23:54:06,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:06,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608022224] [2023-08-29 23:54:06,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:54:06,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:06,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:06,350 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:06,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-29 23:54:06,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:54:06,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:54:06,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:54:06,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:06,542 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:54:06,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:54:06,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 23:54:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:06,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:54:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:06,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:06,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608022224] [2023-08-29 23:54:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608022224] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 23:54:06,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 23:54:06,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-29 23:54:06,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024296803] [2023-08-29 23:54:06,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:54:06,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:54:06,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:06,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:54:06,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:54:06,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 248 [2023-08-29 23:54:06,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 210 transitions, 3012 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:06,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:06,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 248 [2023-08-29 23:54:06,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:54:20,049 INFO L130 PetriNetUnfolder]: 39869/71467 cut-off events. [2023-08-29 23:54:20,049 INFO L131 PetriNetUnfolder]: For 700277/707122 co-relation queries the response was YES. [2023-08-29 23:54:20,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377719 conditions, 71467 events. 39869/71467 cut-off events. For 700277/707122 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 652473 event pairs, 26956 based on Foata normal form. 5882/77184 useless extension candidates. Maximal degree in co-relation 377642. Up to 65444 conditions per place. [2023-08-29 23:54:21,199 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 156 selfloop transitions, 60 changer transitions 0/235 dead transitions. [2023-08-29 23:54:21,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 235 transitions, 3798 flow [2023-08-29 23:54:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:54:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:54:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 518 transitions. [2023-08-29 23:54:21,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774193548387095 [2023-08-29 23:54:21,201 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 518 transitions. [2023-08-29 23:54:21,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 518 transitions. [2023-08-29 23:54:21,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:54:21,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 518 transitions. [2023-08-29 23:54:21,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:21,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:21,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:21,203 INFO L175 Difference]: Start difference. First operand has 195 places, 210 transitions, 3012 flow. Second operand 5 states and 518 transitions. [2023-08-29 23:54:21,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 235 transitions, 3798 flow [2023-08-29 23:54:25,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 235 transitions, 3477 flow, removed 111 selfloop flow, removed 3 redundant places. [2023-08-29 23:54:25,208 INFO L231 Difference]: Finished difference. Result has 197 places, 210 transitions, 2906 flow [2023-08-29 23:54:25,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2906, PETRI_PLACES=197, PETRI_TRANSITIONS=210} [2023-08-29 23:54:25,209 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 161 predicate places. [2023-08-29 23:54:25,209 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 210 transitions, 2906 flow [2023-08-29 23:54:25,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:25,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:25,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:54:25,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-08-29 23:54:25,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:25,409 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:54:25,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1955996916, now seen corresponding path program 2 times [2023-08-29 23:54:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:25,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688200818] [2023-08-29 23:54:25,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:54:25,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:25,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:25,411 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:25,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-29 23:54:25,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:54:25,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:54:25,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:54:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:25,563 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:54:25,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:54:25,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 23:54:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:25,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:54:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:25,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:25,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688200818] [2023-08-29 23:54:25,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688200818] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 23:54:25,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 23:54:25,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-29 23:54:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334380868] [2023-08-29 23:54:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:54:25,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:54:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:54:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:54:25,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 248 [2023-08-29 23:54:25,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 210 transitions, 2906 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:25,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:25,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 248 [2023-08-29 23:54:25,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:54:38,927 INFO L130 PetriNetUnfolder]: 39180/70104 cut-off events. [2023-08-29 23:54:38,927 INFO L131 PetriNetUnfolder]: For 566488/566976 co-relation queries the response was YES. [2023-08-29 23:54:39,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355393 conditions, 70104 events. 39180/70104 cut-off events. For 566488/566976 co-relation queries the response was YES. Maximal size of possible extension queue 1571. Compared 634327 event pairs, 27816 based on Foata normal form. 1452/71495 useless extension candidates. Maximal degree in co-relation 355314. Up to 62528 conditions per place. [2023-08-29 23:54:40,096 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 155 selfloop transitions, 60 changer transitions 0/235 dead transitions. [2023-08-29 23:54:40,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 235 transitions, 3570 flow [2023-08-29 23:54:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:54:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:54:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 518 transitions. [2023-08-29 23:54:40,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774193548387095 [2023-08-29 23:54:40,098 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 518 transitions. [2023-08-29 23:54:40,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 518 transitions. [2023-08-29 23:54:40,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:54:40,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 518 transitions. [2023-08-29 23:54:40,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:40,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:40,100 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:40,100 INFO L175 Difference]: Start difference. First operand has 197 places, 210 transitions, 2906 flow. Second operand 5 states and 518 transitions. [2023-08-29 23:54:40,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 235 transitions, 3570 flow [2023-08-29 23:54:44,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 235 transitions, 3387 flow, removed 44 selfloop flow, removed 6 redundant places. [2023-08-29 23:54:44,354 INFO L231 Difference]: Finished difference. Result has 196 places, 210 transitions, 2916 flow [2023-08-29 23:54:44,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2916, PETRI_PLACES=196, PETRI_TRANSITIONS=210} [2023-08-29 23:54:44,355 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 160 predicate places. [2023-08-29 23:54:44,355 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 210 transitions, 2916 flow [2023-08-29 23:54:44,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:44,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:44,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:54:44,371 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 [2023-08-29 23:54:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:44,565 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:54:44,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash 739681408, now seen corresponding path program 1 times [2023-08-29 23:54:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:44,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754767895] [2023-08-29 23:54:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:54:44,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:44,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:44,567 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:44,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-29 23:54:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:54:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 23:54:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:44,735 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 [2023-08-29 23:54:44,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-29 23:54:44,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:44,870 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 6 case distinctions, treesize of input 126 treesize of output 46 [2023-08-29 23:54:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:44,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:54:45,197 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_693 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_693) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (_ bv0 32) (bvadd c_~counter~0 (bvneg .cse0))) (not (bvsle c_~counter~0 (bvadd (_ bv2147483647 32) .cse0)))))) (forall ((v_ArrVal_693 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_693) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (_ bv0 32) (bvadd c_~counter~0 (bvneg .cse5))) (not (bvsge .cse5 (_ bv0 32)))))))) is different from false [2023-08-29 23:54:45,347 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-29 23:54:45,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 146 [2023-08-29 23:54:45,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:45,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 54 [2023-08-29 23:54:46,797 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-29 23:54:46,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 310 treesize of output 166 [2023-08-29 23:54:46,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:46,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 74 [2023-08-29 23:54:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:52,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:52,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754767895] [2023-08-29 23:54:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754767895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:54:52,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:54:52,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 23:54:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91962428] [2023-08-29 23:54:52,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:54:52,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:54:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:54:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=158, Unknown=1, NotChecked=26, Total=240 [2023-08-29 23:54:52,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 248 [2023-08-29 23:54:52,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 210 transitions, 2916 flow. Second operand has 16 states, 16 states have (on average 76.125) internal successors, (1218), 16 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:52,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:52,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 248 [2023-08-29 23:54:52,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:06,133 INFO L130 PetriNetUnfolder]: 39977/71293 cut-off events. [2023-08-29 23:55:06,133 INFO L131 PetriNetUnfolder]: For 561769/561769 co-relation queries the response was YES. [2023-08-29 23:55:07,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362438 conditions, 71293 events. 39977/71293 cut-off events. For 561769/561769 co-relation queries the response was YES. Maximal size of possible extension queue 1583. Compared 642751 event pairs, 19601 based on Foata normal form. 21/71314 useless extension candidates. Maximal degree in co-relation 362361. Up to 69420 conditions per place. [2023-08-29 23:55:07,244 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 184 selfloop transitions, 54 changer transitions 7/245 dead transitions. [2023-08-29 23:55:07,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 245 transitions, 3635 flow [2023-08-29 23:55:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:55:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:55:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2023-08-29 23:55:07,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33064516129032256 [2023-08-29 23:55:07,246 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2023-08-29 23:55:07,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2023-08-29 23:55:07,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:07,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2023-08-29 23:55:07,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:07,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:07,249 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:07,249 INFO L175 Difference]: Start difference. First operand has 196 places, 210 transitions, 2916 flow. Second operand 7 states and 574 transitions. [2023-08-29 23:55:07,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 245 transitions, 3635 flow [2023-08-29 23:55:12,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 245 transitions, 3537 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-29 23:55:12,338 INFO L231 Difference]: Finished difference. Result has 198 places, 216 transitions, 3023 flow [2023-08-29 23:55:12,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3023, PETRI_PLACES=198, PETRI_TRANSITIONS=216} [2023-08-29 23:55:12,338 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 162 predicate places. [2023-08-29 23:55:12,339 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 216 transitions, 3023 flow [2023-08-29 23:55:12,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 76.125) internal successors, (1218), 16 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:12,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:12,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:12,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:12,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:12,544 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:55:12,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1505151110, now seen corresponding path program 2 times [2023-08-29 23:55:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:12,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163015838] [2023-08-29 23:55:12,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:55:12,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:12,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:12,545 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:12,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-29 23:55:12,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:55:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:55:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:55:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:12,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:55:12,883 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 161 treesize of output 51 [2023-08-29 23:55:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:55:12,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:13,329 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-29 23:55:13,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2023-08-29 23:55:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:55:15,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:15,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163015838] [2023-08-29 23:55:15,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163015838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:15,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:55:15,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-29 23:55:15,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268371028] [2023-08-29 23:55:15,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:15,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:55:15,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:55:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:55:16,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-29 23:55:16,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 216 transitions, 3023 flow. Second operand has 9 states, 9 states have (on average 104.77777777777777) internal successors, (943), 9 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:16,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:16,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-29 23:55:16,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:30,073 INFO L130 PetriNetUnfolder]: 40505/72229 cut-off events. [2023-08-29 23:55:30,073 INFO L131 PetriNetUnfolder]: For 520642/520642 co-relation queries the response was YES. [2023-08-29 23:55:30,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365785 conditions, 72229 events. 40505/72229 cut-off events. For 520642/520642 co-relation queries the response was YES. Maximal size of possible extension queue 1599. Compared 652439 event pairs, 21275 based on Foata normal form. 21/72250 useless extension candidates. Maximal degree in co-relation 365709. Up to 71070 conditions per place. [2023-08-29 23:55:31,226 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 206 selfloop transitions, 49 changer transitions 3/258 dead transitions. [2023-08-29 23:55:31,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 258 transitions, 4033 flow [2023-08-29 23:55:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:55:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:55:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 658 transitions. [2023-08-29 23:55:31,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422043010752688 [2023-08-29 23:55:31,232 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 658 transitions. [2023-08-29 23:55:31,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 658 transitions. [2023-08-29 23:55:31,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:31,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 658 transitions. [2023-08-29 23:55:31,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 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) [2023-08-29 23:55:31,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:31,235 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:31,235 INFO L175 Difference]: Start difference. First operand has 198 places, 216 transitions, 3023 flow. Second operand 6 states and 658 transitions. [2023-08-29 23:55:31,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 258 transitions, 4033 flow [2023-08-29 23:55:36,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 258 transitions, 3855 flow, removed 60 selfloop flow, removed 4 redundant places. [2023-08-29 23:55:36,382 INFO L231 Difference]: Finished difference. Result has 202 places, 242 transitions, 3458 flow [2023-08-29 23:55:36,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3458, PETRI_PLACES=202, PETRI_TRANSITIONS=242} [2023-08-29 23:55:36,383 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 166 predicate places. [2023-08-29 23:55:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 242 transitions, 3458 flow [2023-08-29 23:55:36,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.77777777777777) internal successors, (943), 9 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:36,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:36,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:36,586 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:55:36,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash -630859748, now seen corresponding path program 3 times [2023-08-29 23:55:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248502449] [2023-08-29 23:55:36,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:55:36,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:36,587 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:36,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-29 23:55:36,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:55:36,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:55:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:55:36,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:36,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:55:36,958 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 161 treesize of output 51 [2023-08-29 23:55:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:55:37,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:37,319 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-29 23:55:37,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2023-08-29 23:55:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:55:39,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:39,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248502449] [2023-08-29 23:55:39,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248502449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:39,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:55:39,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-29 23:55:39,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694725047] [2023-08-29 23:55:39,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:55:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:55:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:55:40,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-29 23:55:40,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 242 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 104.66666666666667) internal successors, (942), 9 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:40,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:40,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-29 23:55:40,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:54,220 INFO L130 PetriNetUnfolder]: 40817/72795 cut-off events. [2023-08-29 23:55:54,220 INFO L131 PetriNetUnfolder]: For 527433/527433 co-relation queries the response was YES. [2023-08-29 23:55:55,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372564 conditions, 72795 events. 40817/72795 cut-off events. For 527433/527433 co-relation queries the response was YES. Maximal size of possible extension queue 1611. Compared 658162 event pairs, 21313 based on Foata normal form. 21/72816 useless extension candidates. Maximal degree in co-relation 372487. Up to 71636 conditions per place. [2023-08-29 23:55:55,535 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 216 selfloop transitions, 49 changer transitions 3/268 dead transitions. [2023-08-29 23:55:55,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 268 transitions, 4199 flow [2023-08-29 23:55:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:55:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:55:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 660 transitions. [2023-08-29 23:55:55,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2023-08-29 23:55:55,538 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 660 transitions. [2023-08-29 23:55:55,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 660 transitions. [2023-08-29 23:55:55,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:55,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 660 transitions. [2023-08-29 23:55:55,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:55,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:55,540 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:55,540 INFO L175 Difference]: Start difference. First operand has 202 places, 242 transitions, 3458 flow. Second operand 6 states and 660 transitions. [2023-08-29 23:55:55,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 268 transitions, 4199 flow [2023-08-29 23:56:00,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 268 transitions, 4136 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-29 23:56:00,419 INFO L231 Difference]: Finished difference. Result has 209 places, 250 transitions, 3699 flow [2023-08-29 23:56:00,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3699, PETRI_PLACES=209, PETRI_TRANSITIONS=250} [2023-08-29 23:56:00,419 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 173 predicate places. [2023-08-29 23:56:00,420 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 250 transitions, 3699 flow [2023-08-29 23:56:00,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.66666666666667) internal successors, (942), 9 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:00,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:00,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:00,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:00,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:00,625 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:56:00,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:00,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1257558826, now seen corresponding path program 4 times [2023-08-29 23:56:00,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:00,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470986616] [2023-08-29 23:56:00,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:56:00,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:00,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:00,626 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:56:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-29 23:56:00,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:56:00,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:56:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:56:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:00,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:56:00,983 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 128 treesize of output 40 [2023-08-29 23:56:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:56:01,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:56:01,311 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-29 23:56:01,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2023-08-29 23:56:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:56:02,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:02,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470986616] [2023-08-29 23:56:02,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470986616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:56:02,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:56:02,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-29 23:56:02,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247926163] [2023-08-29 23:56:02,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:56:02,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:56:02,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:56:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:56:03,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-29 23:56:03,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 250 transitions, 3699 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:03,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:03,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-29 23:56:03,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:18,264 INFO L130 PetriNetUnfolder]: 41253/73569 cut-off events. [2023-08-29 23:56:18,265 INFO L131 PetriNetUnfolder]: For 546599/546599 co-relation queries the response was YES. [2023-08-29 23:56:19,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380368 conditions, 73569 events. 41253/73569 cut-off events. For 546599/546599 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 665729 event pairs, 21387 based on Foata normal form. 21/73590 useless extension candidates. Maximal degree in co-relation 380287. Up to 72494 conditions per place. [2023-08-29 23:56:19,420 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 229 selfloop transitions, 44 changer transitions 5/278 dead transitions. [2023-08-29 23:56:19,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 278 transitions, 4535 flow [2023-08-29 23:56:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:56:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:56:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 658 transitions. [2023-08-29 23:56:19,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422043010752688 [2023-08-29 23:56:19,422 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 658 transitions. [2023-08-29 23:56:19,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 658 transitions. [2023-08-29 23:56:19,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:19,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 658 transitions. [2023-08-29 23:56:19,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 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) [2023-08-29 23:56:19,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:19,424 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:19,424 INFO L175 Difference]: Start difference. First operand has 209 places, 250 transitions, 3699 flow. Second operand 6 states and 658 transitions. [2023-08-29 23:56:19,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 278 transitions, 4535 flow [2023-08-29 23:56:24,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 278 transitions, 4438 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-08-29 23:56:24,190 INFO L231 Difference]: Finished difference. Result has 213 places, 260 transitions, 3910 flow [2023-08-29 23:56:24,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3910, PETRI_PLACES=213, PETRI_TRANSITIONS=260} [2023-08-29 23:56:24,191 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 177 predicate places. [2023-08-29 23:56:24,192 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 260 transitions, 3910 flow [2023-08-29 23:56:24,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:24,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:24,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:24,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:24,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:24,397 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:56:24,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:24,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1462259520, now seen corresponding path program 5 times [2023-08-29 23:56:24,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:24,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647146600] [2023-08-29 23:56:24,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:56:24,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:24,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:24,399 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:56:24,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-29 23:56:24,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:56:24,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:56:24,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 23:56:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:24,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:56:24,779 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 6 case distinctions, treesize of input 104 treesize of output 40 [2023-08-29 23:56:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:56:24,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:56:25,179 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-29 23:56:25,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 170 treesize of output 83 [2023-08-29 23:56:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:56:26,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:26,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647146600] [2023-08-29 23:56:26,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647146600] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:56:26,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:56:26,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2023-08-29 23:56:26,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421822895] [2023-08-29 23:56:26,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:56:26,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:56:26,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:26,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:56:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:56:27,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 248 [2023-08-29 23:56:27,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 260 transitions, 3910 flow. Second operand has 12 states, 12 states have (on average 102.83333333333333) internal successors, (1234), 12 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:27,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:27,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 248 [2023-08-29 23:56:27,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:42,655 INFO L130 PetriNetUnfolder]: 41563/74129 cut-off events. [2023-08-29 23:56:42,655 INFO L131 PetriNetUnfolder]: For 568183/568183 co-relation queries the response was YES. [2023-08-29 23:56:43,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387230 conditions, 74129 events. 41563/74129 cut-off events. For 568183/568183 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 670598 event pairs, 20394 based on Foata normal form. 21/74150 useless extension candidates. Maximal degree in co-relation 387146. Up to 72587 conditions per place. [2023-08-29 23:56:43,891 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 213 selfloop transitions, 66 changer transitions 7/286 dead transitions. [2023-08-29 23:56:43,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 286 transitions, 4761 flow [2023-08-29 23:56:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:56:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:56:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 748 transitions. [2023-08-29 23:56:43,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308755760368664 [2023-08-29 23:56:43,894 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 748 transitions. [2023-08-29 23:56:43,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 748 transitions. [2023-08-29 23:56:43,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:43,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 748 transitions. [2023-08-29 23:56:43,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:43,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:43,897 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:43,897 INFO L175 Difference]: Start difference. First operand has 213 places, 260 transitions, 3910 flow. Second operand 7 states and 748 transitions. [2023-08-29 23:56:43,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 286 transitions, 4761 flow [2023-08-29 23:56:49,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 286 transitions, 4649 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-08-29 23:56:49,215 INFO L231 Difference]: Finished difference. Result has 219 places, 266 transitions, 4146 flow [2023-08-29 23:56:49,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4146, PETRI_PLACES=219, PETRI_TRANSITIONS=266} [2023-08-29 23:56:49,216 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 183 predicate places. [2023-08-29 23:56:49,216 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 266 transitions, 4146 flow [2023-08-29 23:56:49,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 102.83333333333333) internal successors, (1234), 12 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:49,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:49,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:49,225 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 [2023-08-29 23:56:49,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:49,417 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:56:49,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash -885986158, now seen corresponding path program 6 times [2023-08-29 23:56:49,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879924028] [2023-08-29 23:56:49,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:56:49,418 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 [2023-08-29 23:56:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:49,419 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:56:49,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-08-29 23:56:49,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-29 23:56:49,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:56:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:56:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:49,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:56:49,780 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 128 treesize of output 40 [2023-08-29 23:56:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:56:49,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:56:50,096 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-29 23:56:50,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2023-08-29 23:56:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:56:51,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879924028] [2023-08-29 23:56:51,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879924028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:56:51,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:56:51,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-29 23:56:51,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497623398] [2023-08-29 23:56:51,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:56:51,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:56:51,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:56:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:56:52,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-29 23:56:52,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 266 transitions, 4146 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:52,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:52,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-29 23:56:52,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:08,065 INFO L130 PetriNetUnfolder]: 41546/74068 cut-off events. [2023-08-29 23:57:08,065 INFO L131 PetriNetUnfolder]: For 584510/584510 co-relation queries the response was YES. [2023-08-29 23:57:09,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389777 conditions, 74068 events. 41546/74068 cut-off events. For 584510/584510 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 670689 event pairs, 20930 based on Foata normal form. 21/74089 useless extension candidates. Maximal degree in co-relation 389689. Up to 73003 conditions per place. [2023-08-29 23:57:09,346 INFO L137 encePairwiseOnDemand]: 242/248 looper letters, 240 selfloop transitions, 41 changer transitions 6/287 dead transitions. [2023-08-29 23:57:09,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 287 transitions, 4968 flow [2023-08-29 23:57:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:57:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:57:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 656 transitions. [2023-08-29 23:57:09,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2023-08-29 23:57:09,348 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 656 transitions. [2023-08-29 23:57:09,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 656 transitions. [2023-08-29 23:57:09,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:09,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 656 transitions. [2023-08-29 23:57:09,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.33333333333333) internal successors, (656), 6 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:09,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:09,350 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:09,350 INFO L175 Difference]: Start difference. First operand has 219 places, 266 transitions, 4146 flow. Second operand 6 states and 656 transitions. [2023-08-29 23:57:09,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 287 transitions, 4968 flow [2023-08-29 23:57:14,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 287 transitions, 4793 flow, removed 65 selfloop flow, removed 3 redundant places. [2023-08-29 23:57:14,277 INFO L231 Difference]: Finished difference. Result has 223 places, 270 transitions, 4225 flow [2023-08-29 23:57:14,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4225, PETRI_PLACES=223, PETRI_TRANSITIONS=270} [2023-08-29 23:57:14,277 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 187 predicate places. [2023-08-29 23:57:14,278 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 270 transitions, 4225 flow [2023-08-29 23:57:14,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:14,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:14,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:57:14,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2023-08-29 23:57:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:57:14,481 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:57:14,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:14,481 INFO L85 PathProgramCache]: Analyzing trace with hash -75596602, now seen corresponding path program 7 times [2023-08-29 23:57:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219475974] [2023-08-29 23:57:14,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:57:14,482 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 [2023-08-29 23:57:14,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:14,483 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:57:14,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-08-29 23:57:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:57:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:14,755 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:57:14,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:57:14,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 23:57:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:57:15,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:57:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:57:15,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:15,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219475974] [2023-08-29 23:57:15,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219475974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:57:15,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:57:15,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 23:57:15,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306464054] [2023-08-29 23:57:15,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:57:15,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:57:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:57:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:57:17,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-29 23:57:17,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 270 transitions, 4225 flow. Second operand has 14 states, 14 states have (on average 96.14285714285714) internal successors, (1346), 14 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:17,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:17,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-29 23:57:17,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:31,914 INFO L130 PetriNetUnfolder]: 37358/66340 cut-off events. [2023-08-29 23:57:31,914 INFO L131 PetriNetUnfolder]: For 603041/609974 co-relation queries the response was YES. [2023-08-29 23:57:32,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355592 conditions, 66340 events. 37358/66340 cut-off events. For 603041/609974 co-relation queries the response was YES. Maximal size of possible extension queue 1524. Compared 594631 event pairs, 25336 based on Foata normal form. 6433/72676 useless extension candidates. Maximal degree in co-relation 355501. Up to 56395 conditions per place. [2023-08-29 23:57:33,024 INFO L137 encePairwiseOnDemand]: 241/248 looper letters, 202 selfloop transitions, 101 changer transitions 0/316 dead transitions. [2023-08-29 23:57:33,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 316 transitions, 5126 flow [2023-08-29 23:57:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:57:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:57:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1097 transitions. [2023-08-29 23:57:33,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40212609970674484 [2023-08-29 23:57:33,027 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1097 transitions. [2023-08-29 23:57:33,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1097 transitions. [2023-08-29 23:57:33,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:33,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1097 transitions. [2023-08-29 23:57:33,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.72727272727273) internal successors, (1097), 11 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:33,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:33,031 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:33,031 INFO L175 Difference]: Start difference. First operand has 223 places, 270 transitions, 4225 flow. Second operand 11 states and 1097 transitions. [2023-08-29 23:57:33,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 316 transitions, 5126 flow [2023-08-29 23:57:38,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 316 transitions, 4988 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-08-29 23:57:38,308 INFO L231 Difference]: Finished difference. Result has 215 places, 252 transitions, 3979 flow [2023-08-29 23:57:38,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3979, PETRI_PLACES=215, PETRI_TRANSITIONS=252} [2023-08-29 23:57:38,309 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 179 predicate places. [2023-08-29 23:57:38,309 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 252 transitions, 3979 flow [2023-08-29 23:57:38,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 96.14285714285714) internal successors, (1346), 14 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:38,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:57:38,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2023-08-29 23:57:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:57:38,509 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:57:38,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash -820349160, now seen corresponding path program 8 times [2023-08-29 23:57:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:38,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979063455] [2023-08-29 23:57:38,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:57:38,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:57:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:38,511 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:57:38,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-08-29 23:57:38,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:57:38,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:57:38,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:57:38,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:38,747 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:57:38,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:57:38,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 23:57:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:57:39,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:57:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:57:39,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:39,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979063455] [2023-08-29 23:57:39,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979063455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:57:39,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:57:39,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 23:57:39,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094617134] [2023-08-29 23:57:39,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:57:39,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:57:39,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:57:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:57:41,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 248 [2023-08-29 23:57:41,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 252 transitions, 3979 flow. Second operand has 14 states, 14 states have (on average 96.14285714285714) internal successors, (1346), 14 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:41,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 248 [2023-08-29 23:57:41,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand