./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:55:27,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:55:27,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:55:27,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:55:27,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:55:27,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:55:27,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:55:27,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:55:27,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:55:27,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:55:27,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:55:27,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:55:27,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:55:27,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:55:27,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:55:27,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:55:27,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:55:27,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:55:27,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:55:27,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:55:27,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:55:27,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:55:27,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:55:27,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:55:27,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:55:27,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:55:27,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:55:27,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:55:27,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:55:27,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:55:27,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:55:27,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:55:27,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:55:27,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:55:27,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:55:27,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:55:27,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:55:27,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:55:27,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:55:27,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:55:27,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:55:27,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:55:27,180 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:55:27,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:55:27,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:55:27,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:55:27,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:55:27,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:55:27,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:55:27,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:55:27,186 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:55:27,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:55:27,187 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:55:27,187 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:55:27,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:55:27,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:55:27,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:55:27,188 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:55:27,188 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:55:27,188 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:55:27,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:55:27,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:55:27,189 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:55:27,189 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:55:27,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:55:27,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:55:27,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:55:27,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:55:27,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:55:27,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:55:27,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:55:27,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:55:27,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:55:27,191 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:55:27,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:55:27,192 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:55:27,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:55:27,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:55:27,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:55:27,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:55:27,525 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:55:27,526 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:55:27,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-09-01 03:55:28,789 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:55:28,968 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:55:28,968 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-09-01 03:55:28,975 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c6dd3f77/9069ce8fbef941daa02ba47e96678f69/FLAG6d6e45d90 [2023-09-01 03:55:28,987 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c6dd3f77/9069ce8fbef941daa02ba47e96678f69 [2023-09-01 03:55:28,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:55:28,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:55:28,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:55:28,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:55:28,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:55:28,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:55:28" (1/1) ... [2023-09-01 03:55:29,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db0ce49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:28, skipping insertion in model container [2023-09-01 03:55:29,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:55:28" (1/1) ... [2023-09-01 03:55:29,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:55:29,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:55:29,212 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-simple-queue.wvr.c[2438,2451] [2023-09-01 03:55:29,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:55:29,240 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:55:29,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18ede6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:29, skipping insertion in model container [2023-09-01 03:55:29,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:55:29,243 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:55:29,246 INFO L158 Benchmark]: Toolchain (without parser) took 253.27ms. Allocated memory is still 69.2MB. Free memory was 36.6MB in the beginning and 42.8MB in the end (delta: -6.2MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2023-09-01 03:55:29,246 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 54.5MB. Free memory was 32.0MB in the beginning and 32.0MB in the end (delta: 50.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:55:29,247 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.28ms. Allocated memory is still 69.2MB. Free memory was 36.4MB in the beginning and 42.8MB in the end (delta: -6.4MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2023-09-01 03:55:29,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 54.5MB. Free memory was 32.0MB in the beginning and 32.0MB in the end (delta: 50.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.28ms. Allocated memory is still 69.2MB. Free memory was 36.4MB in the beginning and 42.8MB in the end (delta: -6.4MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 95]: 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-simple-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:55:30,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:55:30,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:55:30,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:55:30,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:55:30,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:55:30,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:55:30,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:55:30,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:55:30,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:55:30,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:55:30,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:55:30,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:55:30,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:55:30,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:55:30,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:55:31,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:55:31,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:55:31,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:55:31,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:55:31,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:55:31,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:55:31,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:55:31,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:55:31,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:55:31,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:55:31,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:55:31,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:55:31,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:55:31,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:55:31,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:55:31,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:55:31,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:55:31,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:55:31,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:55:31,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:55:31,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:55:31,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:55:31,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:55:31,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:55:31,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:55:31,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:55:31,085 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:55:31,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:55:31,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:55:31,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:55:31,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:55:31,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:55:31,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:55:31,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:55:31,089 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:55:31,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:55:31,090 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:55:31,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:55:31,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:55:31,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:55:31,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:55:31,091 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:55:31,091 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:55:31,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:55:31,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:55:31,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:55:31,092 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:55:31,092 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:55:31,092 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:55:31,092 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:55:31,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:55:31,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:55:31,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:55:31,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:55:31,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:55:31,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:55:31,094 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:55:31,094 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:55:31,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:55:31,094 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:55:31,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:55:31,095 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:55:31,095 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:55:31,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:55:31,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:55:31,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:55:31,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:55:31,395 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:55:31,396 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:55:31,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-09-01 03:55:32,606 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:55:32,822 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:55:32,823 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-09-01 03:55:32,830 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aff52463/bb0f39b408f249bc84e6d38f3872d4e1/FLAG6722e09a2 [2023-09-01 03:55:32,849 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aff52463/bb0f39b408f249bc84e6d38f3872d4e1 [2023-09-01 03:55:32,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:55:32,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:55:32,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:55:32,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:55:32,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:55:32,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:55:32" (1/1) ... [2023-09-01 03:55:32,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2986989c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:32, skipping insertion in model container [2023-09-01 03:55:32,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:55:32" (1/1) ... [2023-09-01 03:55:32,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:55:32,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:55:33,015 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-09-01 03:55:33,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:55:33,034 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:55:33,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:55:33,046 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-simple-queue.wvr.c[2438,2451] [2023-09-01 03:55:33,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:55:33,061 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:55:33,099 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-simple-queue.wvr.c[2438,2451] [2023-09-01 03:55:33,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:55:33,120 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:55:33,123 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:55:33,130 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:55:33,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33 WrapperNode [2023-09-01 03:55:33,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:55:33,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:55:33,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:55:33,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:55:33,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,194 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 130 [2023-09-01 03:55:33,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:55:33,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:55:33,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:55:33,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:55:33,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,246 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:55:33,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:55:33,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:55:33,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:55:33,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (1/1) ... [2023-09-01 03:55:33,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:55:33,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:55:33,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:55:33,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:55:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:55:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:55:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:55:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:55:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:55:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:55:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:55:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:55:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:55:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:55:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:55:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:55:33,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:55:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:55:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:55:33,380 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:55:33,501 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:55:33,503 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:55:33,901 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:55:34,080 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:55:34,091 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 03:55:34,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:55:34 BoogieIcfgContainer [2023-09-01 03:55:34,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:55:34,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:55:34,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:55:34,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:55:34,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:55:32" (1/3) ... [2023-09-01 03:55:34,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c2134b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:55:34, skipping insertion in model container [2023-09-01 03:55:34,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:55:33" (2/3) ... [2023-09-01 03:55:34,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c2134b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:55:34, skipping insertion in model container [2023-09-01 03:55:34,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:55:34" (3/3) ... [2023-09-01 03:55:34,102 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-09-01 03:55:34,117 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:55:34,117 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 03:55:34,117 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:55:34,170 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 03:55:34,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 130 transitions, 276 flow [2023-09-01 03:55:34,277 INFO L130 PetriNetUnfolder]: 9/128 cut-off events. [2023-09-01 03:55:34,277 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:55:34,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 9/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-09-01 03:55:34,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 130 transitions, 276 flow [2023-09-01 03:55:34,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 124 transitions, 260 flow [2023-09-01 03:55:34,294 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:55:34,307 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 124 transitions, 260 flow [2023-09-01 03:55:34,312 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 124 transitions, 260 flow [2023-09-01 03:55:34,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 260 flow [2023-09-01 03:55:34,349 INFO L130 PetriNetUnfolder]: 9/124 cut-off events. [2023-09-01 03:55:34,349 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:55:34,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 9/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-09-01 03:55:34,352 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-09-01 03:55:45,536 INFO L134 LiptonReduction]: Checked pairs total: 988 [2023-09-01 03:55:45,537 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-09-01 03:55:45,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:55:45,554 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;@70618de8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:55:45,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-09-01 03:55:45,558 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:55:45,558 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:55:45,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:45,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:55:45,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:45,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash 18032, now seen corresponding path program 1 times [2023-09-01 03:55:45,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:45,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731184140] [2023-09-01 03:55:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:45,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:45,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:45,581 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:45,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:55:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:45,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:55:45,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:45,867 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:55:45,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:55:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:45,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:45,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:45,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731184140] [2023-09-01 03:55:45,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731184140] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:45,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:45,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:45,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144908450] [2023-09-01 03:55:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:45,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:45,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:46,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-09-01 03:55:46,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:46,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:46,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-09-01 03:55:46,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:46,382 INFO L130 PetriNetUnfolder]: 291/498 cut-off events. [2023-09-01 03:55:46,383 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 03:55:46,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 498 events. 291/498 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2042 event pairs, 210 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 424. Up to 251 conditions per place. [2023-09-01 03:55:46,388 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-09-01 03:55:46,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 248 flow [2023-09-01 03:55:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-09-01 03:55:46,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472636815920398 [2023-09-01 03:55:46,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-09-01 03:55:46,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-09-01 03:55:46,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:46,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-09-01 03:55:46,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:46,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:46,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:46,420 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 380 transitions. [2023-09-01 03:55:46,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 248 flow [2023-09-01 03:55:46,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:55:46,425 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 74 flow [2023-09-01 03:55:46,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-09-01 03:55:46,434 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-09-01 03:55:46,435 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 74 flow [2023-09-01 03:55:46,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:46,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:46,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:55:46,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:46,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:46,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:46,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:46,642 INFO L85 PathProgramCache]: Analyzing trace with hash 18070, now seen corresponding path program 1 times [2023-09-01 03:55:46,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:46,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107531428] [2023-09-01 03:55:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:46,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:46,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:46,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:55:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:46,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:55:46,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:46,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:46,758 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 03:55:46,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 03:55:46,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 03:55:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:46,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:46,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107531428] [2023-09-01 03:55:46,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107531428] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:46,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:46,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690786165] [2023-09-01 03:55:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:46,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:46,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-09-01 03:55:46,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:46,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:46,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-09-01 03:55:46,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:47,075 INFO L130 PetriNetUnfolder]: 227/400 cut-off events. [2023-09-01 03:55:47,075 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:55:47,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 400 events. 227/400 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1571 event pairs, 162 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 407. Up to 400 conditions per place. [2023-09-01 03:55:47,078 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 03:55:47,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 126 flow [2023-09-01 03:55:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-09-01 03:55:47,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43532338308457713 [2023-09-01 03:55:47,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-09-01 03:55:47,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-09-01 03:55:47,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:47,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-09-01 03:55:47,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,087 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 74 flow. Second operand 3 states and 350 transitions. [2023-09-01 03:55:47,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 126 flow [2023-09-01 03:55:47,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:47,088 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 70 flow [2023-09-01 03:55:47,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, 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=70, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-09-01 03:55:47,089 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-09-01 03:55:47,089 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 70 flow [2023-09-01 03:55:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:47,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:55:47,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:47,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:47,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:47,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash 18069, now seen corresponding path program 1 times [2023-09-01 03:55:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:47,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086335554] [2023-09-01 03:55:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:47,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:47,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:47,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:47,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:55:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:47,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:55:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:47,405 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 03:55:47,405 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 [2023-09-01 03:55:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:47,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:47,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086335554] [2023-09-01 03:55:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086335554] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:47,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:47,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122361319] [2023-09-01 03:55:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:47,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:47,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-09-01 03:55:47,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:47,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-09-01 03:55:47,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:47,684 INFO L130 PetriNetUnfolder]: 163/302 cut-off events. [2023-09-01 03:55:47,684 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:55:47,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 302 events. 163/302 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1131 event pairs, 114 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 615. Up to 302 conditions per place. [2023-09-01 03:55:47,686 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-09-01 03:55:47,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 118 flow [2023-09-01 03:55:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-09-01 03:55:47,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43283582089552236 [2023-09-01 03:55:47,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-09-01 03:55:47,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-09-01 03:55:47,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:47,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-09-01 03:55:47,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,695 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 70 flow. Second operand 3 states and 348 transitions. [2023-09-01 03:55:47,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 118 flow [2023-09-01 03:55:47,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:47,697 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 67 flow [2023-09-01 03:55:47,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-09-01 03:55:47,698 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-09-01 03:55:47,698 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 67 flow [2023-09-01 03:55:47,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:47,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:47,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:55:47,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:47,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:47,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:47,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash 18031, now seen corresponding path program 1 times [2023-09-01 03:55:47,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:47,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109237360] [2023-09-01 03:55:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:47,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:47,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:47,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:47,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:55:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:47,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:55:47,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:48,004 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:55:48,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:55:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:48,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:48,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:48,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109237360] [2023-09-01 03:55:48,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109237360] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:48,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:48,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:48,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187111102] [2023-09-01 03:55:48,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:48,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:48,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:48,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-09-01 03:55:48,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:48,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:48,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-09-01 03:55:48,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:48,218 INFO L130 PetriNetUnfolder]: 163/300 cut-off events. [2023-09-01 03:55:48,218 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:55:48,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 300 events. 163/300 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1122 event pairs, 114 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 611. Up to 300 conditions per place. [2023-09-01 03:55:48,222 INFO L137 encePairwiseOnDemand]: 266/268 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-09-01 03:55:48,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 115 flow [2023-09-01 03:55:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-09-01 03:55:48,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2023-09-01 03:55:48,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-09-01 03:55:48,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-09-01 03:55:48,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:48,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-09-01 03:55:48,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:48,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:48,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:48,228 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 67 flow. Second operand 3 states and 346 transitions. [2023-09-01 03:55:48,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 115 flow [2023-09-01 03:55:48,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:48,229 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 66 flow [2023-09-01 03:55:48,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-09-01 03:55:48,231 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-09-01 03:55:48,231 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 66 flow [2023-09-01 03:55:48,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:48,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:48,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:55:48,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:48,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:48,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:48,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 560749, now seen corresponding path program 1 times [2023-09-01 03:55:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:48,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569943967] [2023-09-01 03:55:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:48,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:48,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:48,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:55:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:55:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:48,560 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:55:48,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:55:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:48,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:55:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:48,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:48,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569943967] [2023-09-01 03:55:48,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569943967] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:55:48,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:55:48,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:55:48,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553808005] [2023-09-01 03:55:48,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:55:48,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:55:48,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:55:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:55:49,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:55:49,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 66 flow. Second operand has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:49,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:49,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:55:49,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:49,739 INFO L130 PetriNetUnfolder]: 246/453 cut-off events. [2023-09-01 03:55:49,739 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:55:49,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 453 events. 246/453 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1899 event pairs, 171 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 925. Up to 151 conditions per place. [2023-09-01 03:55:49,741 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 65 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-09-01 03:55:49,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 72 transitions, 318 flow [2023-09-01 03:55:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:55:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:55:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 687 transitions. [2023-09-01 03:55:49,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42723880597014924 [2023-09-01 03:55:49,744 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 687 transitions. [2023-09-01 03:55:49,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 687 transitions. [2023-09-01 03:55:49,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:49,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 687 transitions. [2023-09-01 03:55:49,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:49,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:49,750 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:49,751 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 66 flow. Second operand 6 states and 687 transitions. [2023-09-01 03:55:49,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 72 transitions, 318 flow [2023-09-01 03:55:49,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 72 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:49,752 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 119 flow [2023-09-01 03:55:49,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-09-01 03:55:49,753 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-09-01 03:55:49,753 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 119 flow [2023-09-01 03:55:49,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:49,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:49,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:55:49,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:49,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:49,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:49,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash 17376030, now seen corresponding path program 1 times [2023-09-01 03:55:49,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:49,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161699756] [2023-09-01 03:55:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:49,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:49,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:49,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:49,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:55:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:55:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:50,049 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 03:55:50,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-09-01 03:55:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:50,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:50,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161699756] [2023-09-01 03:55:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161699756] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:50,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839995382] [2023-09-01 03:55:50,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:50,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:50,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-09-01 03:55:50,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:50,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-09-01 03:55:50,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:50,256 INFO L130 PetriNetUnfolder]: 222/405 cut-off events. [2023-09-01 03:55:50,256 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:55:50,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 405 events. 222/405 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1636 event pairs, 153 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 850. Up to 405 conditions per place. [2023-09-01 03:55:50,259 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 03:55:50,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 28 transitions, 171 flow [2023-09-01 03:55:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-09-01 03:55:50,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417910447761194 [2023-09-01 03:55:50,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-09-01 03:55:50,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-09-01 03:55:50,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:50,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-09-01 03:55:50,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,265 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 119 flow. Second operand 3 states and 336 transitions. [2023-09-01 03:55:50,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 28 transitions, 171 flow [2023-09-01 03:55:50,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 161 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:50,270 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 107 flow [2023-09-01 03:55:50,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-09-01 03:55:50,273 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-09-01 03:55:50,273 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 107 flow [2023-09-01 03:55:50,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:50,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:55:50,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:50,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:50,483 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:50,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:50,483 INFO L85 PathProgramCache]: Analyzing trace with hash 17376032, now seen corresponding path program 1 times [2023-09-01 03:55:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:50,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999242592] [2023-09-01 03:55:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:50,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:50,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:50,485 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:50,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:55:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:55:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:50,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:55:50,594 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 03:55:50,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 03:55:50,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:55:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:50,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:50,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:50,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999242592] [2023-09-01 03:55:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999242592] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:50,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:50,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:55:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924018154] [2023-09-01 03:55:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:55:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:55:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:55:50,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-09-01 03:55:50,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:50,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-09-01 03:55:50,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:50,819 INFO L130 PetriNetUnfolder]: 198/357 cut-off events. [2023-09-01 03:55:50,819 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 03:55:50,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 357 events. 198/357 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1366 event pairs, 135 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 750. Up to 357 conditions per place. [2023-09-01 03:55:50,821 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-09-01 03:55:50,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 155 flow [2023-09-01 03:55:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:55:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:55:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-09-01 03:55:50,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42661691542288555 [2023-09-01 03:55:50,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-09-01 03:55:50,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-09-01 03:55:50,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:50,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-09-01 03:55:50,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,826 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 107 flow. Second operand 3 states and 343 transitions. [2023-09-01 03:55:50,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 155 flow [2023-09-01 03:55:50,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:50,830 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 104 flow [2023-09-01 03:55:50,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-09-01 03:55:50,832 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-09-01 03:55:50,832 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 104 flow [2023-09-01 03:55:50,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:50,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:50,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:55:50,841 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 (8)] Ended with exit code 0 [2023-09-01 03:55:51,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:51,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:51,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash 17376018, now seen corresponding path program 1 times [2023-09-01 03:55:51,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:51,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585227067] [2023-09-01 03:55:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:51,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:51,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:51,045 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:51,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:55:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:55:51,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:51,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:51,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:51,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585227067] [2023-09-01 03:55:51,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585227067] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:51,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:51,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:55:51,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492115081] [2023-09-01 03:55:51,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:51,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:55:51,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:51,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:55:51,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:55:51,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-09-01 03:55:51,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:51,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:51,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-09-01 03:55:51,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:51,388 INFO L130 PetriNetUnfolder]: 142/269 cut-off events. [2023-09-01 03:55:51,388 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 03:55:51,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 269 events. 142/269 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 976 event pairs, 99 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 572. Up to 241 conditions per place. [2023-09-01 03:55:51,390 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 34 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-09-01 03:55:51,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 208 flow [2023-09-01 03:55:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:55:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:55:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-09-01 03:55:51,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43470149253731344 [2023-09-01 03:55:51,392 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-09-01 03:55:51,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-09-01 03:55:51,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:51,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-09-01 03:55:51,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:51,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:51,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:51,396 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 104 flow. Second operand 4 states and 466 transitions. [2023-09-01 03:55:51,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 208 flow [2023-09-01 03:55:51,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:55:51,397 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 133 flow [2023-09-01 03:55:51,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2023-09-01 03:55:51,398 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-09-01 03:55:51,398 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 133 flow [2023-09-01 03:55:51,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:51,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:51,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:55:51,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-09-01 03:55:51,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:51,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:51,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash 538927055, now seen corresponding path program 1 times [2023-09-01 03:55:51,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:51,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223390582] [2023-09-01 03:55:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:51,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:51,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:51,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:51,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:55:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:51,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:55:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:51,743 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:55:51,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:55:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:51,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:55:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:52,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:52,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223390582] [2023-09-01 03:55:52,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223390582] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:55:52,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:55:52,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:55:52,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559816195] [2023-09-01 03:55:52,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:55:52,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:55:52,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:55:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:55:53,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 268 [2023-09-01 03:55:53,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 27 transitions, 133 flow. Second operand has 8 states, 8 states have (on average 99.25) internal successors, (794), 8 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:53,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:53,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 268 [2023-09-01 03:55:53,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:57,121 INFO L130 PetriNetUnfolder]: 156/298 cut-off events. [2023-09-01 03:55:57,121 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 03:55:57,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 298 events. 156/298 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1045 event pairs, 102 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 763. Up to 125 conditions per place. [2023-09-01 03:55:57,122 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 55 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-09-01 03:55:57,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 377 flow [2023-09-01 03:55:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:55:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:55:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1050 transitions. [2023-09-01 03:55:57,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917910447761194 [2023-09-01 03:55:57,129 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1050 transitions. [2023-09-01 03:55:57,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1050 transitions. [2023-09-01 03:55:57,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:57,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1050 transitions. [2023-09-01 03:55:57,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,138 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,138 INFO L175 Difference]: Start difference. First operand has 40 places, 27 transitions, 133 flow. Second operand 10 states and 1050 transitions. [2023-09-01 03:55:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 377 flow [2023-09-01 03:55:57,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 367 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 03:55:57,140 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 164 flow [2023-09-01 03:55:57,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=164, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-09-01 03:55:57,140 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-09-01 03:55:57,141 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 164 flow [2023-09-01 03:55:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.25) internal successors, (794), 8 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:57,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:55:57,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:57,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:57,342 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:57,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash 538927056, now seen corresponding path program 1 times [2023-09-01 03:55:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974490573] [2023-09-01 03:55:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:55:57,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:57,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:57,343 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:57,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:55:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:55:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:55:57,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:57,436 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:55:57,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:55:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:55:57,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:55:57,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:57,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974490573] [2023-09-01 03:55:57,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974490573] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:55:57,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:55:57,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:55:57,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310490483] [2023-09-01 03:55:57,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:55:57,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:55:57,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:57,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:55:57,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:55:57,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 268 [2023-09-01 03:55:57,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:57,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 268 [2023-09-01 03:55:57,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:57,626 INFO L130 PetriNetUnfolder]: 93/189 cut-off events. [2023-09-01 03:55:57,627 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 03:55:57,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 189 events. 93/189 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 561 event pairs, 51 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 512. Up to 182 conditions per place. [2023-09-01 03:55:57,628 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 20 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-09-01 03:55:57,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 26 transitions, 208 flow [2023-09-01 03:55:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:55:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:55:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-09-01 03:55:57,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41044776119402987 [2023-09-01 03:55:57,630 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-09-01 03:55:57,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-09-01 03:55:57,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:55:57,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-09-01 03:55:57,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,634 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,634 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 164 flow. Second operand 4 states and 440 transitions. [2023-09-01 03:55:57,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 26 transitions, 208 flow [2023-09-01 03:55:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 26 transitions, 158 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-09-01 03:55:57,636 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 118 flow [2023-09-01 03:55:57,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-09-01 03:55:57,636 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-09-01 03:55:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 118 flow [2023-09-01 03:55:57,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:55:57,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:55:57,637 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:55:57,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:55:57,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:57,846 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:55:57,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:55:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash -472851024, now seen corresponding path program 2 times [2023-09-01 03:55:57,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:55:57,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528423883] [2023-09-01 03:55:57,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:55:57,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:55:57,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:55:57,847 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:55:57,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:55:57,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:55:57,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:55:57,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:55:57,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:55:57,988 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:55:57,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:55:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:58,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:55:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:55:58,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:55:58,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528423883] [2023-09-01 03:55:58,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528423883] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:55:58,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:55:58,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:55:58,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367365859] [2023-09-01 03:55:58,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:55:58,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:55:58,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:55:58,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:55:58,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:56:00,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 268 [2023-09-01 03:56:00,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 118 flow. Second operand has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:00,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:00,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 268 [2023-09-01 03:56:00,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:03,240 INFO L130 PetriNetUnfolder]: 314/600 cut-off events. [2023-09-01 03:56:03,241 INFO L131 PetriNetUnfolder]: For 579/579 co-relation queries the response was YES. [2023-09-01 03:56:03,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1712 conditions, 600 events. 314/600 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2467 event pairs, 180 based on Foata normal form. 6/606 useless extension candidates. Maximal degree in co-relation 1694. Up to 229 conditions per place. [2023-09-01 03:56:03,243 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 142 selfloop transitions, 12 changer transitions 0/154 dead transitions. [2023-09-01 03:56:03,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 154 transitions, 864 flow [2023-09-01 03:56:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:56:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:56:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1396 transitions. [2023-09-01 03:56:03,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43407960199004975 [2023-09-01 03:56:03,249 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1396 transitions. [2023-09-01 03:56:03,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1396 transitions. [2023-09-01 03:56:03,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:03,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1396 transitions. [2023-09-01 03:56:03,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.33333333333333) internal successors, (1396), 12 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,257 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,257 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 118 flow. Second operand 12 states and 1396 transitions. [2023-09-01 03:56:03,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 154 transitions, 864 flow [2023-09-01 03:56:03,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 154 transitions, 851 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:56:03,262 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 209 flow [2023-09-01 03:56:03,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=209, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2023-09-01 03:56:03,263 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-09-01 03:56:03,263 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 209 flow [2023-09-01 03:56:03,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:03,264 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 03:56:03,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:03,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:03,473 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:03,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash 856746578, now seen corresponding path program 2 times [2023-09-01 03:56:03,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:03,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347437788] [2023-09-01 03:56:03,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:56:03,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:03,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:03,475 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:03,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:56:03,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:56:03,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:56:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:56:03,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:03,610 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:56:03,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:56:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:56:03,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:56:03,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347437788] [2023-09-01 03:56:03,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347437788] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:56:03,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:56:03,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:56:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468439331] [2023-09-01 03:56:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:56:03,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:56:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:56:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:56:03,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-09-01 03:56:03,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:03,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:03,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-09-01 03:56:03,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:04,002 INFO L130 PetriNetUnfolder]: 200/402 cut-off events. [2023-09-01 03:56:04,002 INFO L131 PetriNetUnfolder]: For 486/486 co-relation queries the response was YES. [2023-09-01 03:56:04,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 402 events. 200/402 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1496 event pairs, 90 based on Foata normal form. 72/474 useless extension candidates. Maximal degree in co-relation 1011. Up to 389 conditions per place. [2023-09-01 03:56:04,005 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 24 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2023-09-01 03:56:04,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 31 transitions, 255 flow [2023-09-01 03:56:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:56:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:56:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2023-09-01 03:56:04,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048507462686567 [2023-09-01 03:56:04,007 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2023-09-01 03:56:04,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2023-09-01 03:56:04,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:04,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2023-09-01 03:56:04,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:04,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:04,011 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:04,011 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 209 flow. Second operand 4 states and 434 transitions. [2023-09-01 03:56:04,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 31 transitions, 255 flow [2023-09-01 03:56:04,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 31 transitions, 230 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-09-01 03:56:04,013 INFO L231 Difference]: Finished difference. Result has 52 places, 31 transitions, 182 flow [2023-09-01 03:56:04,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=52, PETRI_TRANSITIONS=31} [2023-09-01 03:56:04,014 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-09-01 03:56:04,014 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 31 transitions, 182 flow [2023-09-01 03:56:04,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:04,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:04,014 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:56:04,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 03:56:04,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:04,225 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:04,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash 23278736, now seen corresponding path program 3 times [2023-09-01 03:56:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:04,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137445624] [2023-09-01 03:56:04,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:56:04,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:04,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:04,227 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:04,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:56:04,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:56:04,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:56:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:56:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:04,489 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:56:04,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:56:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:04,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:06,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137445624] [2023-09-01 03:56:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137445624] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:06,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:06,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:56:06,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076523336] [2023-09-01 03:56:06,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:06,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:56:06,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:56:06,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:56:14,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 268 [2023-09-01 03:56:14,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 31 transitions, 182 flow. Second operand has 24 states, 24 states have (on average 104.0) internal successors, (2496), 24 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:14,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:14,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 268 [2023-09-01 03:56:14,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:28,820 INFO L130 PetriNetUnfolder]: 452/894 cut-off events. [2023-09-01 03:56:28,820 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-09-01 03:56:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 894 events. 452/894 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3588 event pairs, 198 based on Foata normal form. 12/906 useless extension candidates. Maximal degree in co-relation 2260. Up to 253 conditions per place. [2023-09-01 03:56:28,824 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 286 selfloop transitions, 24 changer transitions 0/310 dead transitions. [2023-09-01 03:56:28,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 310 transitions, 1732 flow [2023-09-01 03:56:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:56:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:56:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2794 transitions. [2023-09-01 03:56:28,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343905472636816 [2023-09-01 03:56:28,833 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2794 transitions. [2023-09-01 03:56:28,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2794 transitions. [2023-09-01 03:56:28,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:28,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2794 transitions. [2023-09-01 03:56:28,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 116.41666666666667) internal successors, (2794), 24 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:28,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 268.0) internal successors, (6700), 25 states have internal predecessors, (6700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:28,866 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 268.0) internal successors, (6700), 25 states have internal predecessors, (6700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:28,867 INFO L175 Difference]: Start difference. First operand has 52 places, 31 transitions, 182 flow. Second operand 24 states and 2794 transitions. [2023-09-01 03:56:28,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 310 transitions, 1732 flow [2023-09-01 03:56:28,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 310 transitions, 1707 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:56:28,873 INFO L231 Difference]: Finished difference. Result has 86 places, 44 transitions, 361 flow [2023-09-01 03:56:28,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=44} [2023-09-01 03:56:28,875 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-09-01 03:56:28,875 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 44 transitions, 361 flow [2023-09-01 03:56:28,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 104.0) internal successors, (2496), 24 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:28,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:28,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:28,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:29,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:29,087 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:29,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash -235118424, now seen corresponding path program 1 times [2023-09-01 03:56:29,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:29,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763300812] [2023-09-01 03:56:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:29,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:29,090 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:29,091 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 (15)] Waiting until timeout for monitored process [2023-09-01 03:56:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:56:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:29,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:56:29,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:29,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763300812] [2023-09-01 03:56:29,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763300812] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:56:29,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:56:29,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:56:29,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430640547] [2023-09-01 03:56:29,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:56:29,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:56:29,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:29,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:56:29,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:56:29,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 268 [2023-09-01 03:56:29,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 44 transitions, 361 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) [2023-09-01 03:56:29,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:29,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 268 [2023-09-01 03:56:29,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:29,404 INFO L130 PetriNetUnfolder]: 788/1502 cut-off events. [2023-09-01 03:56:29,404 INFO L131 PetriNetUnfolder]: For 505/505 co-relation queries the response was YES. [2023-09-01 03:56:29,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 1502 events. 788/1502 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6956 event pairs, 198 based on Foata normal form. 22/1524 useless extension candidates. Maximal degree in co-relation 3747. Up to 757 conditions per place. [2023-09-01 03:56:29,410 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 47 selfloop transitions, 2 changer transitions 3/52 dead transitions. [2023-09-01 03:56:29,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 52 transitions, 487 flow [2023-09-01 03:56:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:56:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:56:29,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2023-09-01 03:56:29,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44527363184079605 [2023-09-01 03:56:29,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2023-09-01 03:56:29,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2023-09-01 03:56:29,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:29,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2023-09-01 03:56:29,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:29,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:29,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:29,415 INFO L175 Difference]: Start difference. First operand has 86 places, 44 transitions, 361 flow. Second operand 3 states and 358 transitions. [2023-09-01 03:56:29,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 52 transitions, 487 flow [2023-09-01 03:56:29,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 439 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-09-01 03:56:29,420 INFO L231 Difference]: Finished difference. Result has 79 places, 44 transitions, 319 flow [2023-09-01 03:56:29,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=79, PETRI_TRANSITIONS=44} [2023-09-01 03:56:29,421 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-09-01 03:56:29,421 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 44 transitions, 319 flow [2023-09-01 03:56:29,421 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) [2023-09-01 03:56:29,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:29,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:29,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:29,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:29,631 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:29,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:29,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1873389343, now seen corresponding path program 1 times [2023-09-01 03:56:29,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:29,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725552863] [2023-09-01 03:56:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:29,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:29,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:29,633 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:29,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:56:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:56:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:29,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:56:29,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:29,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725552863] [2023-09-01 03:56:29,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725552863] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:56:29,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:56:29,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:56:29,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545184398] [2023-09-01 03:56:29,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:56:29,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:56:29,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:29,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:56:29,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:56:29,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 268 [2023-09-01 03:56:29,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 44 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:29,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:29,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 268 [2023-09-01 03:56:29,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:30,182 INFO L130 PetriNetUnfolder]: 1023/2027 cut-off events. [2023-09-01 03:56:30,182 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2023-09-01 03:56:30,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 2027 events. 1023/2027 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10933 event pairs, 340 based on Foata normal form. 120/2147 useless extension candidates. Maximal degree in co-relation 5270. Up to 1461 conditions per place. [2023-09-01 03:56:30,193 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 46 selfloop transitions, 2 changer transitions 5/53 dead transitions. [2023-09-01 03:56:30,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 53 transitions, 448 flow [2023-09-01 03:56:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:56:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:56:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-09-01 03:56:30,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43905472636815923 [2023-09-01 03:56:30,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-09-01 03:56:30,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-09-01 03:56:30,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:30,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-09-01 03:56:30,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:30,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:30,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:30,201 INFO L175 Difference]: Start difference. First operand has 79 places, 44 transitions, 319 flow. Second operand 3 states and 353 transitions. [2023-09-01 03:56:30,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 53 transitions, 448 flow [2023-09-01 03:56:30,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 53 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:56:30,209 INFO L231 Difference]: Finished difference. Result has 79 places, 45 transitions, 331 flow [2023-09-01 03:56:30,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=79, PETRI_TRANSITIONS=45} [2023-09-01 03:56:30,210 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-09-01 03:56:30,210 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 45 transitions, 331 flow [2023-09-01 03:56:30,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:30,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:30,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:30,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:30,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:30,421 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:30,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash 289744, now seen corresponding path program 1 times [2023-09-01 03:56:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:30,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160781808] [2023-09-01 03:56:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:56:30,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:30,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:30,423 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:30,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:56:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:56:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:30,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:30,709 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-09-01 03:56:30,710 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 90 treesize of output 27 [2023-09-01 03:56:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:30,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:30,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160781808] [2023-09-01 03:56:30,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160781808] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:30,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:30,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2023-09-01 03:56:30,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432336647] [2023-09-01 03:56:30,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:30,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:56:30,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:56:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:56:30,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:56:30,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 45 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:30,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:30,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:56:30,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:31,583 INFO L130 PetriNetUnfolder]: 1703/3267 cut-off events. [2023-09-01 03:56:31,583 INFO L131 PetriNetUnfolder]: For 2309/2309 co-relation queries the response was YES. [2023-09-01 03:56:31,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 3267 events. 1703/3267 cut-off events. For 2309/2309 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 19471 event pairs, 260 based on Foata normal form. 20/3287 useless extension candidates. Maximal degree in co-relation 9190. Up to 1160 conditions per place. [2023-09-01 03:56:31,601 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 55 selfloop transitions, 6 changer transitions 9/70 dead transitions. [2023-09-01 03:56:31,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 547 flow [2023-09-01 03:56:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:56:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:56:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-09-01 03:56:31,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126865671641791 [2023-09-01 03:56:31,604 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-09-01 03:56:31,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-09-01 03:56:31,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:31,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-09-01 03:56:31,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:31,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 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) [2023-09-01 03:56:31,609 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 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) [2023-09-01 03:56:31,610 INFO L175 Difference]: Start difference. First operand has 79 places, 45 transitions, 331 flow. Second operand 5 states and 553 transitions. [2023-09-01 03:56:31,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 547 flow [2023-09-01 03:56:31,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 543 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 03:56:31,616 INFO L231 Difference]: Finished difference. Result has 84 places, 48 transitions, 368 flow [2023-09-01 03:56:31,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=84, PETRI_TRANSITIONS=48} [2023-09-01 03:56:31,617 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 50 predicate places. [2023-09-01 03:56:31,618 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 48 transitions, 368 flow [2023-09-01 03:56:31,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:31,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:31,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:31,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-09-01 03:56:31,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:31,827 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:31,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1604271614, now seen corresponding path program 2 times [2023-09-01 03:56:31,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:31,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418778338] [2023-09-01 03:56:31,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:56:31,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:31,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:31,833 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:31,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:56:31,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:56:31,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:56:31,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:56:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:31,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-09-01 03:56:32,110 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 51 treesize of output 47 [2023-09-01 03:56:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:32,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:32,369 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:56:32,370 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 95 treesize of output 73 [2023-09-01 03:56:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:56:32,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:32,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418778338] [2023-09-01 03:56:32,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418778338] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:32,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:32,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-09-01 03:56:32,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587717565] [2023-09-01 03:56:32,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:32,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:56:32,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:32,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:56:32,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:56:33,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-09-01 03:56:33,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 48 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:33,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:33,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-09-01 03:56:33,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:33,846 INFO L130 PetriNetUnfolder]: 2023/3847 cut-off events. [2023-09-01 03:56:33,846 INFO L131 PetriNetUnfolder]: For 4289/4289 co-relation queries the response was YES. [2023-09-01 03:56:33,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11774 conditions, 3847 events. 2023/3847 cut-off events. For 4289/4289 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 23418 event pairs, 360 based on Foata normal form. 20/3867 useless extension candidates. Maximal degree in co-relation 11730. Up to 1280 conditions per place. [2023-09-01 03:56:33,870 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 55 selfloop transitions, 6 changer transitions 9/70 dead transitions. [2023-09-01 03:56:33,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 70 transitions, 573 flow [2023-09-01 03:56:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:56:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:56:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 527 transitions. [2023-09-01 03:56:33,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932835820895522 [2023-09-01 03:56:33,874 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 527 transitions. [2023-09-01 03:56:33,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 527 transitions. [2023-09-01 03:56:33,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:33,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 527 transitions. [2023-09-01 03:56:33,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:33,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 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) [2023-09-01 03:56:33,878 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 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) [2023-09-01 03:56:33,878 INFO L175 Difference]: Start difference. First operand has 84 places, 48 transitions, 368 flow. Second operand 5 states and 527 transitions. [2023-09-01 03:56:33,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 70 transitions, 573 flow [2023-09-01 03:56:33,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 70 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:56:33,895 INFO L231 Difference]: Finished difference. Result has 87 places, 49 transitions, 391 flow [2023-09-01 03:56:33,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=391, PETRI_PLACES=87, PETRI_TRANSITIONS=49} [2023-09-01 03:56:33,895 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 53 predicate places. [2023-09-01 03:56:33,896 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 49 transitions, 391 flow [2023-09-01 03:56:33,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:33,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:33,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:33,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:34,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:34,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:34,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1614039090, now seen corresponding path program 3 times [2023-09-01 03:56:34,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:34,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96457547] [2023-09-01 03:56:34,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:56:34,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:34,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:34,109 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:34,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:56:34,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:56:34,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:56:34,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:56:34,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:34,318 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:56:34,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:56:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:34,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:35,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96457547] [2023-09-01 03:56:35,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96457547] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:35,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:35,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 03:56:35,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474772420] [2023-09-01 03:56:35,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:56:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:56:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:56:36,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-09-01 03:56:36,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 49 transitions, 391 flow. Second operand has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:36,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:36,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-09-01 03:56:36,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:37,632 INFO L130 PetriNetUnfolder]: 1995/3805 cut-off events. [2023-09-01 03:56:37,632 INFO L131 PetriNetUnfolder]: For 7382/7382 co-relation queries the response was YES. [2023-09-01 03:56:37,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12336 conditions, 3805 events. 1995/3805 cut-off events. For 7382/7382 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 22960 event pairs, 588 based on Foata normal form. 12/3817 useless extension candidates. Maximal degree in co-relation 12291. Up to 1923 conditions per place. [2023-09-01 03:56:37,656 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 42 selfloop transitions, 11 changer transitions 31/84 dead transitions. [2023-09-01 03:56:37,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 84 transitions, 688 flow [2023-09-01 03:56:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:56:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:56:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 901 transitions. [2023-09-01 03:56:37,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37354892205638474 [2023-09-01 03:56:37,662 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 901 transitions. [2023-09-01 03:56:37,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 901 transitions. [2023-09-01 03:56:37,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:37,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 901 transitions. [2023-09-01 03:56:37,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.11111111111111) internal successors, (901), 9 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:37,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:37,668 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:37,668 INFO L175 Difference]: Start difference. First operand has 87 places, 49 transitions, 391 flow. Second operand 9 states and 901 transitions. [2023-09-01 03:56:37,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 84 transitions, 688 flow [2023-09-01 03:56:37,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 84 transitions, 673 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 03:56:37,690 INFO L231 Difference]: Finished difference. Result has 94 places, 48 transitions, 401 flow [2023-09-01 03:56:37,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=401, PETRI_PLACES=94, PETRI_TRANSITIONS=48} [2023-09-01 03:56:37,691 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 60 predicate places. [2023-09-01 03:56:37,691 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 48 transitions, 401 flow [2023-09-01 03:56:37,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:37,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:37,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:37,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:37,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:37,902 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:37,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1259228725, now seen corresponding path program 4 times [2023-09-01 03:56:37,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:37,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256307793] [2023-09-01 03:56:37,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:56:37,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:37,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:37,904 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:37,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 03:56:38,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:56:38,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:56:38,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:56:38,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:38,067 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:56:38,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:56:38,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 03:56:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:38,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:56:38,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:38,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256307793] [2023-09-01 03:56:38,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256307793] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:38,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:38,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 03:56:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677851071] [2023-09-01 03:56:38,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:38,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:56:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:56:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:56:40,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-09-01 03:56:40,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 48 transitions, 401 flow. Second operand has 14 states, 14 states have (on average 99.21428571428571) internal successors, (1389), 14 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:40,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:40,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-09-01 03:56:40,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:41,930 INFO L130 PetriNetUnfolder]: 4330/8394 cut-off events. [2023-09-01 03:56:41,930 INFO L131 PetriNetUnfolder]: For 19554/19554 co-relation queries the response was YES. [2023-09-01 03:56:41,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26407 conditions, 8394 events. 4330/8394 cut-off events. For 19554/19554 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 61824 event pairs, 1285 based on Foata normal form. 372/8766 useless extension candidates. Maximal degree in co-relation 26361. Up to 3440 conditions per place. [2023-09-01 03:56:41,974 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 94 selfloop transitions, 22 changer transitions 10/126 dead transitions. [2023-09-01 03:56:41,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 1050 flow [2023-09-01 03:56:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:56:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:56:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1255 transitions. [2023-09-01 03:56:41,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902363184079602 [2023-09-01 03:56:41,980 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1255 transitions. [2023-09-01 03:56:41,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1255 transitions. [2023-09-01 03:56:41,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:41,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1255 transitions. [2023-09-01 03:56:41,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.58333333333333) internal successors, (1255), 12 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:41,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:41,987 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:41,987 INFO L175 Difference]: Start difference. First operand has 94 places, 48 transitions, 401 flow. Second operand 12 states and 1255 transitions. [2023-09-01 03:56:41,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 1050 flow [2023-09-01 03:56:42,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 126 transitions, 997 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-09-01 03:56:42,127 INFO L231 Difference]: Finished difference. Result has 100 places, 64 transitions, 624 flow [2023-09-01 03:56:42,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=624, PETRI_PLACES=100, PETRI_TRANSITIONS=64} [2023-09-01 03:56:42,127 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 66 predicate places. [2023-09-01 03:56:42,127 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 64 transitions, 624 flow [2023-09-01 03:56:42,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 99.21428571428571) internal successors, (1389), 14 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:42,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:42,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:42,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:42,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:42,328 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:42,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:42,329 INFO L85 PathProgramCache]: Analyzing trace with hash -517506536, now seen corresponding path program 5 times [2023-09-01 03:56:42,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:42,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545359597] [2023-09-01 03:56:42,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:56:42,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:42,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:42,330 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:42,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 03:56:42,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:56:42,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:56:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:56:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:56:42,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:42,640 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-09-01 03:56:42,641 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 91 treesize of output 29 [2023-09-01 03:56:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:56:42,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:42,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545359597] [2023-09-01 03:56:42,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545359597] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:42,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:42,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-09-01 03:56:42,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830682072] [2023-09-01 03:56:42,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:42,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:56:42,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:42,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:56:42,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:56:42,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:56:42,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 64 transitions, 624 flow. Second operand has 9 states, 9 states have (on average 104.88888888888889) internal successors, (944), 9 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:42,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:42,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:56:42,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:45,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:47,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:48,926 INFO L130 PetriNetUnfolder]: 6732/12821 cut-off events. [2023-09-01 03:56:48,926 INFO L131 PetriNetUnfolder]: For 40321/40321 co-relation queries the response was YES. [2023-09-01 03:56:48,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47795 conditions, 12821 events. 6732/12821 cut-off events. For 40321/40321 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 98770 event pairs, 642 based on Foata normal form. 22/12843 useless extension candidates. Maximal degree in co-relation 47746. Up to 3833 conditions per place. [2023-09-01 03:56:48,987 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 101 selfloop transitions, 35 changer transitions 14/150 dead transitions. [2023-09-01 03:56:48,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 150 transitions, 1449 flow [2023-09-01 03:56:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:56:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:56:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-09-01 03:56:48,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134328358208955 [2023-09-01 03:56:48,991 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-09-01 03:56:48,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-09-01 03:56:48,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:48,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-09-01 03:56:48,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:48,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:48,999 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:48,999 INFO L175 Difference]: Start difference. First operand has 100 places, 64 transitions, 624 flow. Second operand 10 states and 1108 transitions. [2023-09-01 03:56:48,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 150 transitions, 1449 flow [2023-09-01 03:56:49,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1352 flow, removed 45 selfloop flow, removed 3 redundant places. [2023-09-01 03:56:49,221 INFO L231 Difference]: Finished difference. Result has 111 places, 83 transitions, 943 flow [2023-09-01 03:56:49,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=943, PETRI_PLACES=111, PETRI_TRANSITIONS=83} [2023-09-01 03:56:49,222 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2023-09-01 03:56:49,222 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 83 transitions, 943 flow [2023-09-01 03:56:49,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.88888888888889) internal successors, (944), 9 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:49,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:49,223 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:49,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:49,434 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:49,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash 325092292, now seen corresponding path program 6 times [2023-09-01 03:56:49,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:49,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99465637] [2023-09-01 03:56:49,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:56:49,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:49,435 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:49,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 03:56:49,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:56:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:56:49,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:56:49,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:56:49,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:49,689 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-09-01 03:56:49,689 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 90 treesize of output 27 [2023-09-01 03:56:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:56:49,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:49,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99465637] [2023-09-01 03:56:49,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99465637] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:49,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:49,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 03:56:49,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253028548] [2023-09-01 03:56:49,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:49,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:56:49,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:56:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:56:49,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:56:49,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 83 transitions, 943 flow. Second operand has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:49,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:49,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:56:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:51,859 INFO L130 PetriNetUnfolder]: 6732/12743 cut-off events. [2023-09-01 03:56:51,859 INFO L131 PetriNetUnfolder]: For 49146/49146 co-relation queries the response was YES. [2023-09-01 03:56:51,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50165 conditions, 12743 events. 6732/12743 cut-off events. For 49146/49146 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 97346 event pairs, 702 based on Foata normal form. 78/12821 useless extension candidates. Maximal degree in co-relation 50110. Up to 3043 conditions per place. [2023-09-01 03:56:51,922 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 80 selfloop transitions, 30 changer transitions 38/148 dead transitions. [2023-09-01 03:56:51,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 148 transitions, 1481 flow [2023-09-01 03:56:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:56:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:56:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-09-01 03:56:51,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134328358208955 [2023-09-01 03:56:51,926 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-09-01 03:56:51,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-09-01 03:56:51,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:56:51,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-09-01 03:56:51,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:51,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:51,930 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:51,930 INFO L175 Difference]: Start difference. First operand has 111 places, 83 transitions, 943 flow. Second operand 10 states and 1108 transitions. [2023-09-01 03:56:51,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 148 transitions, 1481 flow [2023-09-01 03:56:52,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 148 transitions, 1391 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-09-01 03:56:52,291 INFO L231 Difference]: Finished difference. Result has 120 places, 81 transitions, 928 flow [2023-09-01 03:56:52,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=928, PETRI_PLACES=120, PETRI_TRANSITIONS=81} [2023-09-01 03:56:52,292 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 86 predicate places. [2023-09-01 03:56:52,292 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 81 transitions, 928 flow [2023-09-01 03:56:52,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:52,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:56:52,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:56:52,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:56:52,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:52,493 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:56:52,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:56:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1100956100, now seen corresponding path program 7 times [2023-09-01 03:56:52,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:56:52,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034477993] [2023-09-01 03:56:52,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:56:52,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:56:52,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:56:52,495 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:56:52,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 03:56:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:56:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:56:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:56:52,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:56:52,801 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 52 treesize of output 48 [2023-09-01 03:56:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:56:52,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:56:53,186 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2023-09-01 03:56:53,186 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 96 treesize of output 81 [2023-09-01 03:56:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:56:53,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:56:53,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034477993] [2023-09-01 03:56:53,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034477993] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:56:53,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:56:53,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-09-01 03:56:53,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394781986] [2023-09-01 03:56:53,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:56:53,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:56:53,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:56:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:56:53,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:56:54,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-09-01 03:56:54,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 81 transitions, 928 flow. Second operand has 12 states, 12 states have (on average 98.91666666666667) internal successors, (1187), 12 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:56:54,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:56:54,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-09-01 03:56:54,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:56:56,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:58,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:57:00,510 INFO L130 PetriNetUnfolder]: 7000/13219 cut-off events. [2023-09-01 03:57:00,510 INFO L131 PetriNetUnfolder]: For 53228/53228 co-relation queries the response was YES. [2023-09-01 03:57:00,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52462 conditions, 13219 events. 7000/13219 cut-off events. For 53228/53228 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 101038 event pairs, 742 based on Foata normal form. 22/13241 useless extension candidates. Maximal degree in co-relation 52405. Up to 2675 conditions per place. [2023-09-01 03:57:00,571 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 81 selfloop transitions, 36 changer transitions 28/145 dead transitions. [2023-09-01 03:57:00,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 145 transitions, 1472 flow [2023-09-01 03:57:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:57:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:57:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1053 transitions. [2023-09-01 03:57:00,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39291044776119405 [2023-09-01 03:57:00,574 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1053 transitions. [2023-09-01 03:57:00,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1053 transitions. [2023-09-01 03:57:00,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:57:00,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1053 transitions. [2023-09-01 03:57:00,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.3) internal successors, (1053), 10 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:00,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:00,579 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:00,579 INFO L175 Difference]: Start difference. First operand has 120 places, 81 transitions, 928 flow. Second operand 10 states and 1053 transitions. [2023-09-01 03:57:00,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 145 transitions, 1472 flow [2023-09-01 03:57:00,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 145 transitions, 1449 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 03:57:00,760 INFO L231 Difference]: Finished difference. Result has 126 places, 83 transitions, 1024 flow [2023-09-01 03:57:00,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1024, PETRI_PLACES=126, PETRI_TRANSITIONS=83} [2023-09-01 03:57:00,760 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 92 predicate places. [2023-09-01 03:57:00,760 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 83 transitions, 1024 flow [2023-09-01 03:57:00,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.91666666666667) internal successors, (1187), 12 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:00,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:57:00,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:57:00,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 03:57:00,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:00,964 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:57:00,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:57:00,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1667175346, now seen corresponding path program 8 times [2023-09-01 03:57:00,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:57:00,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102771264] [2023-09-01 03:57:00,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:57:00,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:57:00,966 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:57:00,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 03:57:01,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:57:01,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:57:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 03:57:01,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:57:01,274 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:57:01,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:57:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:57:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:57:02,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:02,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102771264] [2023-09-01 03:57:02,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102771264] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:02,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:02,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-09-01 03:57:02,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598358847] [2023-09-01 03:57:02,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:02,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 03:57:02,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:02,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 03:57:02,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-09-01 03:57:06,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-09-01 03:57:06,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 83 transitions, 1024 flow. Second operand has 18 states, 18 states have (on average 95.94444444444444) internal successors, (1727), 18 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:06,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:06,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-09-01 03:57:06,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:09,609 INFO L130 PetriNetUnfolder]: 7058/13347 cut-off events. [2023-09-01 03:57:09,610 INFO L131 PetriNetUnfolder]: For 72113/72113 co-relation queries the response was YES. [2023-09-01 03:57:09,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54966 conditions, 13347 events. 7058/13347 cut-off events. For 72113/72113 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 102649 event pairs, 4702 based on Foata normal form. 36/13383 useless extension candidates. Maximal degree in co-relation 54908. Up to 12430 conditions per place. [2023-09-01 03:57:09,672 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 62 selfloop transitions, 5 changer transitions 64/131 dead transitions. [2023-09-01 03:57:09,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 131 transitions, 1535 flow [2023-09-01 03:57:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:57:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:57:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1099 transitions. [2023-09-01 03:57:09,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37279511533242876 [2023-09-01 03:57:09,676 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1099 transitions. [2023-09-01 03:57:09,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1099 transitions. [2023-09-01 03:57:09,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:57:09,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1099 transitions. [2023-09-01 03:57:09,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.9090909090909) internal successors, (1099), 11 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:09,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:09,681 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:09,681 INFO L175 Difference]: Start difference. First operand has 126 places, 83 transitions, 1024 flow. Second operand 11 states and 1099 transitions. [2023-09-01 03:57:09,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 131 transitions, 1535 flow [2023-09-01 03:57:09,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 131 transitions, 1479 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-09-01 03:57:09,885 INFO L231 Difference]: Finished difference. Result has 132 places, 67 transitions, 771 flow [2023-09-01 03:57:09,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=771, PETRI_PLACES=132, PETRI_TRANSITIONS=67} [2023-09-01 03:57:09,885 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 98 predicate places. [2023-09-01 03:57:09,885 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 67 transitions, 771 flow [2023-09-01 03:57:09,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.94444444444444) internal successors, (1727), 18 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:09,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:57:09,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:57:09,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 03:57:10,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:10,086 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:57:10,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:57:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -682567175, now seen corresponding path program 9 times [2023-09-01 03:57:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:57:10,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900374851] [2023-09-01 03:57:10,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:57:10,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:57:10,088 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:57:10,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 03:57:10,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:57:10,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:57:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:57:10,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:57:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:57:10,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:57:10,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900374851] [2023-09-01 03:57:10,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900374851] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:10,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:10,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-09-01 03:57:10,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815191112] [2023-09-01 03:57:10,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:10,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 03:57:10,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:10,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 03:57:10,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-09-01 03:57:11,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 268 [2023-09-01 03:57:11,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 67 transitions, 771 flow. Second operand has 11 states, 11 states have (on average 108.0) internal successors, (1188), 11 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:11,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:11,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 268 [2023-09-01 03:57:11,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:14,588 INFO L130 PetriNetUnfolder]: 13397/25125 cut-off events. [2023-09-01 03:57:14,588 INFO L131 PetriNetUnfolder]: For 144611/144611 co-relation queries the response was YES. [2023-09-01 03:57:14,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100400 conditions, 25125 events. 13397/25125 cut-off events. For 144611/144611 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 214692 event pairs, 2622 based on Foata normal form. 342/25467 useless extension candidates. Maximal degree in co-relation 100339. Up to 8551 conditions per place. [2023-09-01 03:57:14,791 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 80 selfloop transitions, 36 changer transitions 5/121 dead transitions. [2023-09-01 03:57:14,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 121 transitions, 1541 flow [2023-09-01 03:57:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:57:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:57:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2023-09-01 03:57:14,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42661691542288555 [2023-09-01 03:57:14,793 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 686 transitions. [2023-09-01 03:57:14,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 686 transitions. [2023-09-01 03:57:14,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:57:14,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 686 transitions. [2023-09-01 03:57:14,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.33333333333333) internal successors, (686), 6 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:14,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:14,797 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:14,797 INFO L175 Difference]: Start difference. First operand has 132 places, 67 transitions, 771 flow. Second operand 6 states and 686 transitions. [2023-09-01 03:57:14,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 121 transitions, 1541 flow [2023-09-01 03:57:15,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 1342 flow, removed 69 selfloop flow, removed 13 redundant places. [2023-09-01 03:57:15,453 INFO L231 Difference]: Finished difference. Result has 117 places, 90 transitions, 1081 flow [2023-09-01 03:57:15,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1081, PETRI_PLACES=117, PETRI_TRANSITIONS=90} [2023-09-01 03:57:15,454 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 83 predicate places. [2023-09-01 03:57:15,454 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 90 transitions, 1081 flow [2023-09-01 03:57:15,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.0) internal successors, (1188), 11 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:15,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:57:15,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:57:15,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 03:57:15,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:15,666 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:57:15,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:57:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1396224912, now seen corresponding path program 10 times [2023-09-01 03:57:15,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:57:15,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679976567] [2023-09-01 03:57:15,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:57:15,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:15,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:57:15,667 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:57:15,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 03:57:15,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:57:15,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:57:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:57:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:57:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 03:57:15,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:15,982 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-09-01 03:57:15,982 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 90 treesize of output 27 [2023-09-01 03:57:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 03:57:16,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:16,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679976567] [2023-09-01 03:57:16,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679976567] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:16,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:16,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-09-01 03:57:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436403451] [2023-09-01 03:57:16,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:57:16,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:57:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:57:16,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:57:16,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 90 transitions, 1081 flow. Second operand has 10 states, 10 states have (on average 105.1) internal successors, (1051), 10 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:16,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:16,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:57:16,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:20,769 INFO L130 PetriNetUnfolder]: 18147/33884 cut-off events. [2023-09-01 03:57:20,769 INFO L131 PetriNetUnfolder]: For 133230/133230 co-relation queries the response was YES. [2023-09-01 03:57:20,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134248 conditions, 33884 events. 18147/33884 cut-off events. For 133230/133230 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 298766 event pairs, 1159 based on Foata normal form. 133/34017 useless extension candidates. Maximal degree in co-relation 134194. Up to 9577 conditions per place. [2023-09-01 03:57:21,006 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 117 selfloop transitions, 69 changer transitions 20/206 dead transitions. [2023-09-01 03:57:21,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 206 transitions, 2144 flow [2023-09-01 03:57:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:57:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:57:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1670 transitions. [2023-09-01 03:57:21,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154228855721393 [2023-09-01 03:57:21,009 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1670 transitions. [2023-09-01 03:57:21,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1670 transitions. [2023-09-01 03:57:21,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:57:21,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1670 transitions. [2023-09-01 03:57:21,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.33333333333333) internal successors, (1670), 15 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:21,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:21,014 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:21,014 INFO L175 Difference]: Start difference. First operand has 117 places, 90 transitions, 1081 flow. Second operand 15 states and 1670 transitions. [2023-09-01 03:57:21,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 206 transitions, 2144 flow [2023-09-01 03:57:21,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 206 transitions, 2020 flow, removed 61 selfloop flow, removed 1 redundant places. [2023-09-01 03:57:21,963 INFO L231 Difference]: Finished difference. Result has 138 places, 113 transitions, 1504 flow [2023-09-01 03:57:21,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1504, PETRI_PLACES=138, PETRI_TRANSITIONS=113} [2023-09-01 03:57:21,963 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 104 predicate places. [2023-09-01 03:57:21,963 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 113 transitions, 1504 flow [2023-09-01 03:57:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.1) internal successors, (1051), 10 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:21,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:57:21,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:57:21,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 03:57:22,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:22,170 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:57:22,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:57:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1546134480, now seen corresponding path program 11 times [2023-09-01 03:57:22,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:57:22,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078238112] [2023-09-01 03:57:22,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:57:22,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:22,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:57:22,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:57:22,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 03:57:22,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 03:57:22,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:57:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:57:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:57:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:57:22,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:22,619 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-09-01 03:57:22,619 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 91 treesize of output 29 [2023-09-01 03:57:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:57:22,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:22,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078238112] [2023-09-01 03:57:22,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078238112] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:22,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:22,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-09-01 03:57:22,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534478304] [2023-09-01 03:57:22,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:22,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:57:22,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:22,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:57:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:57:23,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:57:23,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 113 transitions, 1504 flow. Second operand has 12 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:23,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:23,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:57:23,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:25,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:57:27,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:57:29,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:57:31,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:57:37,855 INFO L130 PetriNetUnfolder]: 23049/42833 cut-off events. [2023-09-01 03:57:37,855 INFO L131 PetriNetUnfolder]: For 223613/223613 co-relation queries the response was YES. [2023-09-01 03:57:38,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173663 conditions, 42833 events. 23049/42833 cut-off events. For 223613/223613 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 386956 event pairs, 1653 based on Foata normal form. 19/42852 useless extension candidates. Maximal degree in co-relation 173600. Up to 8778 conditions per place. [2023-09-01 03:57:38,227 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 106 selfloop transitions, 87 changer transitions 19/212 dead transitions. [2023-09-01 03:57:38,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 212 transitions, 2620 flow [2023-09-01 03:57:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 03:57:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 03:57:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1442 transitions. [2023-09-01 03:57:38,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41389207807118256 [2023-09-01 03:57:38,230 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1442 transitions. [2023-09-01 03:57:38,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1442 transitions. [2023-09-01 03:57:38,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:57:38,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1442 transitions. [2023-09-01 03:57:38,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.92307692307692) internal successors, (1442), 13 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:38,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:38,234 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:38,234 INFO L175 Difference]: Start difference. First operand has 138 places, 113 transitions, 1504 flow. Second operand 13 states and 1442 transitions. [2023-09-01 03:57:38,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 212 transitions, 2620 flow [2023-09-01 03:57:40,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 212 transitions, 2435 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-09-01 03:57:40,221 INFO L231 Difference]: Finished difference. Result has 146 places, 131 transitions, 1813 flow [2023-09-01 03:57:40,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1813, PETRI_PLACES=146, PETRI_TRANSITIONS=131} [2023-09-01 03:57:40,222 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 112 predicate places. [2023-09-01 03:57:40,222 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 131 transitions, 1813 flow [2023-09-01 03:57:40,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:40,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:57:40,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:57:40,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 03:57:40,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:40,424 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:57:40,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:57:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1159581924, now seen corresponding path program 12 times [2023-09-01 03:57:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:57:40,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387137962] [2023-09-01 03:57:40,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:57:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:57:40,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:57:40,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 03:57:40,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:57:40,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:57:40,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:57:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:57:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 03:57:40,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:40,807 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-09-01 03:57:40,807 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 91 treesize of output 29 [2023-09-01 03:57:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 03:57:40,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387137962] [2023-09-01 03:57:40,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387137962] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:40,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:40,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-09-01 03:57:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419573504] [2023-09-01 03:57:40,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:40,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 03:57:40,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:40,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 03:57:40,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-09-01 03:57:41,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:57:41,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 131 transitions, 1813 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) [2023-09-01 03:57:41,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:41,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:57:41,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:43,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:57:45,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:57:51,932 INFO L130 PetriNetUnfolder]: 23049/42662 cut-off events. [2023-09-01 03:57:51,933 INFO L131 PetriNetUnfolder]: For 217913/217913 co-relation queries the response was YES. [2023-09-01 03:57:52,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171706 conditions, 42662 events. 23049/42662 cut-off events. For 217913/217913 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 384614 event pairs, 1482 based on Foata normal form. 171/42833 useless extension candidates. Maximal degree in co-relation 171643. Up to 8778 conditions per place. [2023-09-01 03:57:52,305 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 97 selfloop transitions, 93 changer transitions 69/259 dead transitions. [2023-09-01 03:57:52,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 259 transitions, 2714 flow [2023-09-01 03:57:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 03:57:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 03:57:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2215 transitions. [2023-09-01 03:57:52,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41324626865671643 [2023-09-01 03:57:52,309 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2215 transitions. [2023-09-01 03:57:52,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2215 transitions. [2023-09-01 03:57:52,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:57:52,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2215 transitions. [2023-09-01 03:57:52,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 110.75) internal successors, (2215), 20 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:52,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:52,316 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:52,316 INFO L175 Difference]: Start difference. First operand has 146 places, 131 transitions, 1813 flow. Second operand 20 states and 2215 transitions. [2023-09-01 03:57:52,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 259 transitions, 2714 flow [2023-09-01 03:57:54,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 259 transitions, 2609 flow, removed 38 selfloop flow, removed 3 redundant places. [2023-09-01 03:57:54,230 INFO L231 Difference]: Finished difference. Result has 171 places, 139 transitions, 2049 flow [2023-09-01 03:57:54,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2049, PETRI_PLACES=171, PETRI_TRANSITIONS=139} [2023-09-01 03:57:54,231 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 137 predicate places. [2023-09-01 03:57:54,231 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 139 transitions, 2049 flow [2023-09-01 03:57:54,231 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) [2023-09-01 03:57:54,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:57:54,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:57:54,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 03:57:54,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:54,432 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:57:54,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:57:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash -577813634, now seen corresponding path program 13 times [2023-09-01 03:57:54,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:57:54,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506111286] [2023-09-01 03:57:54,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:57:54,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:57:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:57:54,433 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:57:54,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 03:57:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:57:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:57:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:57:54,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-09-01 03:57:54,771 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 52 treesize of output 48 [2023-09-01 03:57:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:57:54,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:57:55,164 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2023-09-01 03:57:55,164 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 96 treesize of output 81 [2023-09-01 03:57:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:57:55,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506111286] [2023-09-01 03:57:55,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506111286] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:55,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:55,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2023-09-01 03:57:55,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075059017] [2023-09-01 03:57:55,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 03:57:55,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 03:57:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-09-01 03:57:56,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-09-01 03:57:56,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 139 transitions, 2049 flow. Second operand has 15 states, 15 states have (on average 98.73333333333333) internal successors, (1481), 15 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:56,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:56,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-09-01 03:57:56,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:59,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:58:01,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:58:03,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:58:05,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:58:11,921 INFO L130 PetriNetUnfolder]: 23353/43213 cut-off events. [2023-09-01 03:58:11,921 INFO L131 PetriNetUnfolder]: For 252569/252569 co-relation queries the response was YES. [2023-09-01 03:58:12,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182432 conditions, 43213 events. 23353/43213 cut-off events. For 252569/252569 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 388330 event pairs, 1748 based on Foata normal form. 19/43232 useless extension candidates. Maximal degree in co-relation 182359. Up to 8892 conditions per place. [2023-09-01 03:58:12,480 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 77 selfloop transitions, 97 changer transitions 40/214 dead transitions. [2023-09-01 03:58:12,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 214 transitions, 2696 flow [2023-09-01 03:58:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 03:58:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 03:58:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1370 transitions. [2023-09-01 03:58:12,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932261768082664 [2023-09-01 03:58:12,483 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1370 transitions. [2023-09-01 03:58:12,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1370 transitions. [2023-09-01 03:58:12,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:58:12,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1370 transitions. [2023-09-01 03:58:12,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.38461538461539) internal successors, (1370), 13 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:12,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:12,487 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:12,487 INFO L175 Difference]: Start difference. First operand has 171 places, 139 transitions, 2049 flow. Second operand 13 states and 1370 transitions. [2023-09-01 03:58:12,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 214 transitions, 2696 flow [2023-09-01 03:58:15,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 214 transitions, 2535 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-09-01 03:58:15,171 INFO L231 Difference]: Finished difference. Result has 178 places, 140 transitions, 2108 flow [2023-09-01 03:58:15,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2108, PETRI_PLACES=178, PETRI_TRANSITIONS=140} [2023-09-01 03:58:15,171 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 144 predicate places. [2023-09-01 03:58:15,171 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 140 transitions, 2108 flow [2023-09-01 03:58:15,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.73333333333333) internal successors, (1481), 15 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:15,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:58:15,172 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:58:15,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-09-01 03:58:15,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:58:15,377 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:58:15,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:58:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 685549326, now seen corresponding path program 14 times [2023-09-01 03:58:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:58:15,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268657887] [2023-09-01 03:58:15,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:58:15,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:58:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:58:15,378 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:58:15,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 03:58:15,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:58:15,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:58:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 03:58:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:58:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:58:16,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:58:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:58:18,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:58:18,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268657887] [2023-09-01 03:58:18,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268657887] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:58:18,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:58:18,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-09-01 03:58:18,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852677489] [2023-09-01 03:58:18,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:58:18,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:58:18,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:58:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:58:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:58:20,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 268 [2023-09-01 03:58:20,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 140 transitions, 2108 flow. Second operand has 24 states, 24 states have (on average 102.70833333333333) internal successors, (2465), 24 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:20,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:58:20,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 268 [2023-09-01 03:58:20,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:58:41,541 INFO L130 PetriNetUnfolder]: 40608/74980 cut-off events. [2023-09-01 03:58:41,541 INFO L131 PetriNetUnfolder]: For 556064/556064 co-relation queries the response was YES. [2023-09-01 03:58:42,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320361 conditions, 74980 events. 40608/74980 cut-off events. For 556064/556064 co-relation queries the response was YES. Maximal size of possible extension queue 1847. Compared 732526 event pairs, 6397 based on Foata normal form. 477/75457 useless extension candidates. Maximal degree in co-relation 320287. Up to 21259 conditions per place. [2023-09-01 03:58:42,260 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 105 selfloop transitions, 129 changer transitions 152/386 dead transitions. [2023-09-01 03:58:42,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 386 transitions, 6210 flow [2023-09-01 03:58:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 03:58:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 03:58:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1954 transitions. [2023-09-01 03:58:42,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050580431177446 [2023-09-01 03:58:42,263 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1954 transitions. [2023-09-01 03:58:42,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1954 transitions. [2023-09-01 03:58:42,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:58:42,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1954 transitions. [2023-09-01 03:58:42,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 108.55555555555556) internal successors, (1954), 18 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:42,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:42,268 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:42,268 INFO L175 Difference]: Start difference. First operand has 178 places, 140 transitions, 2108 flow. Second operand 18 states and 1954 transitions. [2023-09-01 03:58:42,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 386 transitions, 6210 flow [2023-09-01 03:58:47,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 386 transitions, 5790 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-09-01 03:58:47,725 INFO L231 Difference]: Finished difference. Result has 187 places, 201 transitions, 3465 flow [2023-09-01 03:58:47,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3465, PETRI_PLACES=187, PETRI_TRANSITIONS=201} [2023-09-01 03:58:47,726 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 153 predicate places. [2023-09-01 03:58:47,726 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 201 transitions, 3465 flow [2023-09-01 03:58:47,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 102.70833333333333) internal successors, (2465), 24 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:47,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:58:47,726 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:58:47,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-09-01 03:58:47,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:58:47,928 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:58:47,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:58:47,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1774687592, now seen corresponding path program 15 times [2023-09-01 03:58:47,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:58:47,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321439265] [2023-09-01 03:58:47,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:58:47,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:58:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:58:47,930 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:58:47,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 03:58:48,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:58:48,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:58:48,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:58:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:58:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:58:48,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:58:48,440 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-09-01 03:58:48,441 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 91 treesize of output 29 [2023-09-01 03:58:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:58:48,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:58:48,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321439265] [2023-09-01 03:58:48,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321439265] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:58:48,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:58:48,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-09-01 03:58:48,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361449217] [2023-09-01 03:58:48,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:58:48,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:58:48,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:58:48,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:58:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:58:49,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:58:49,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 201 transitions, 3465 flow. Second operand has 14 states, 14 states have (on average 104.28571428571429) internal successors, (1460), 14 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:49,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:58:49,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:58:49,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:58:51,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:58:53,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:58:55,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:58:57,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:59:00,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:59:04,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:59:24,962 INFO L130 PetriNetUnfolder]: 65360/120014 cut-off events. [2023-09-01 03:59:24,963 INFO L131 PetriNetUnfolder]: For 970557/970557 co-relation queries the response was YES. [2023-09-01 03:59:25,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533335 conditions, 120014 events. 65360/120014 cut-off events. For 970557/970557 co-relation queries the response was YES. Maximal size of possible extension queue 3035. Compared 1235943 event pairs, 3438 based on Foata normal form. 342/120356 useless extension candidates. Maximal degree in co-relation 533260. Up to 33229 conditions per place. [2023-09-01 03:59:26,192 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 256 selfloop transitions, 266 changer transitions 55/577 dead transitions. [2023-09-01 03:59:26,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 577 transitions, 8067 flow [2023-09-01 03:59:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 03:59:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 03:59:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4445 transitions. [2023-09-01 03:59:26,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146455223880597 [2023-09-01 03:59:26,199 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4445 transitions. [2023-09-01 03:59:26,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4445 transitions. [2023-09-01 03:59:26,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:59:26,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4445 transitions. [2023-09-01 03:59:26,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 111.125) internal successors, (4445), 40 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:26,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 268.0) internal successors, (10988), 41 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:26,212 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 268.0) internal successors, (10988), 41 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:26,213 INFO L175 Difference]: Start difference. First operand has 187 places, 201 transitions, 3465 flow. Second operand 40 states and 4445 transitions. [2023-09-01 03:59:26,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 577 transitions, 8067 flow [2023-09-01 03:59:45,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 577 transitions, 7623 flow, removed 218 selfloop flow, removed 5 redundant places. [2023-09-01 03:59:45,313 INFO L231 Difference]: Finished difference. Result has 232 places, 310 transitions, 5581 flow [2023-09-01 03:59:45,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5581, PETRI_PLACES=232, PETRI_TRANSITIONS=310} [2023-09-01 03:59:45,314 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 198 predicate places. [2023-09-01 03:59:45,314 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 310 transitions, 5581 flow [2023-09-01 03:59:45,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.28571428571429) internal successors, (1460), 14 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:45,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:59:45,314 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:59:45,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-09-01 03:59:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:59:45,515 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:59:45,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:59:45,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1896384868, now seen corresponding path program 16 times [2023-09-01 03:59:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:59:45,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112911498] [2023-09-01 03:59:45,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:59:45,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:59:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:59:45,517 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:59:45,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-09-01 03:59:45,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:59:45,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:59:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:59:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:59:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:59:45,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:59:45,964 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-09-01 03:59:45,965 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 91 treesize of output 29 [2023-09-01 03:59:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:59:46,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:59:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112911498] [2023-09-01 03:59:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112911498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:59:46,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:59:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-09-01 03:59:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625064562] [2023-09-01 03:59:46,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:59:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 03:59:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:59:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 03:59:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-09-01 03:59:46,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 03:59:46,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 310 transitions, 5581 flow. Second operand has 13 states, 13 states have (on average 104.61538461538461) internal successors, (1360), 13 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:59:46,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:59:46,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 03:59:46,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:59:48,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:59:51,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:00:22,202 INFO L130 PetriNetUnfolder]: 73604/134954 cut-off events. [2023-09-01 04:00:22,203 INFO L131 PetriNetUnfolder]: For 1579749/1579749 co-relation queries the response was YES. [2023-09-01 04:00:23,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607278 conditions, 134954 events. 73604/134954 cut-off events. For 1579749/1579749 co-relation queries the response was YES. Maximal size of possible extension queue 3414. Compared 1407265 event pairs, 4644 based on Foata normal form. 396/135350 useless extension candidates. Maximal degree in co-relation 607183. Up to 28243 conditions per place. [2023-09-01 04:00:24,086 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 198 selfloop transitions, 302 changer transitions 64/564 dead transitions. [2023-09-01 04:00:24,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 564 transitions, 9029 flow [2023-09-01 04:00:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 04:00:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 04:00:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3446 transitions. [2023-09-01 04:00:24,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41478093403948 [2023-09-01 04:00:24,093 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3446 transitions. [2023-09-01 04:00:24,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3446 transitions. [2023-09-01 04:00:24,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:00:24,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3446 transitions. [2023-09-01 04:00:24,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 111.16129032258064) internal successors, (3446), 31 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:00:24,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 268.0) internal successors, (8576), 32 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:00:24,105 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 268.0) internal successors, (8576), 32 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:00:24,105 INFO L175 Difference]: Start difference. First operand has 232 places, 310 transitions, 5581 flow. Second operand 31 states and 3446 transitions. [2023-09-01 04:00:24,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 564 transitions, 9029 flow [2023-09-01 04:00:42,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 564 transitions, 8199 flow, removed 166 selfloop flow, removed 4 redundant places. [2023-09-01 04:00:42,215 INFO L231 Difference]: Finished difference. Result has 273 places, 364 transitions, 6363 flow [2023-09-01 04:00:42,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=4882, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6363, PETRI_PLACES=273, PETRI_TRANSITIONS=364} [2023-09-01 04:00:42,215 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 239 predicate places. [2023-09-01 04:00:42,215 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 364 transitions, 6363 flow [2023-09-01 04:00:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.61538461538461) internal successors, (1360), 13 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:00:42,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:00:42,216 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:00:42,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-09-01 04:00:42,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:00:42,417 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 04:00:42,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:00:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1898478316, now seen corresponding path program 17 times [2023-09-01 04:00:42,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:00:42,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053024846] [2023-09-01 04:00:42,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 04:00:42,418 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 [2023-09-01 04:00:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:00:42,419 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:00:42,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-09-01 04:00:42,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 04:00:42,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:00:42,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:00:42,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:00:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 04:00:42,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:00:43,008 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-09-01 04:00:43,008 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 91 treesize of output 29 [2023-09-01 04:00:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 04:00:43,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:00:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053024846] [2023-09-01 04:00:43,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053024846] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:00:43,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:00:43,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2023-09-01 04:00:43,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397166922] [2023-09-01 04:00:43,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:00:43,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 04:00:43,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:00:43,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 04:00:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-09-01 04:00:43,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-09-01 04:00:43,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 364 transitions, 6363 flow. Second operand has 15 states, 15 states have (on average 104.13333333333334) internal successors, (1562), 15 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:00:43,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:00:43,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-09-01 04:00:43,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:00:45,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:00:48,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:00:50,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:00:52,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:00:54,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:00:56,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []