./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:25:07,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:25:07,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:25:07,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:25:07,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:25:07,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:25:07,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:25:07,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:25:07,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:25:07,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:25:07,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:25:07,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:25:07,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:25:07,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:25:07,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:25:07,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:25:07,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:25:07,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:25:07,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:25:07,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:25:07,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:25:07,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:25:07,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:25:07,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:25:07,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:25:07,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:25:07,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:25:07,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:25:07,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:25:07,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:25:07,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:25:07,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:25:07,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:25:07,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:25:07,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:25:07,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:25:07,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:25:07,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:25:07,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:25:07,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:25:07,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:25:07,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:25:07,998 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:25:07,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:25:07,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:25:07,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:25:08,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:25:08,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:25:08,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:25:08,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:25:08,002 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:25:08,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:25:08,003 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:25:08,003 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:25:08,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:25:08,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:25:08,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:25:08,004 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:25:08,004 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:25:08,004 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:25:08,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:25:08,004 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:25:08,004 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:25:08,005 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:25:08,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:25:08,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:25:08,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:25:08,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:25:08,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:25:08,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:25:08,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:25:08,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:25:08,006 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:25:08,007 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:25:08,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:25:08,007 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:25:08,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:25:08,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:25:08,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:25:08,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:25:08,349 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:25:08,349 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:25:08,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 00:25:09,596 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:25:09,861 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:25:09,862 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 00:25:09,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1898f3b44/1d6d81b444814457bfd7ad87b129cb30/FLAG7c90ef5bf [2023-08-30 00:25:09,888 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1898f3b44/1d6d81b444814457bfd7ad87b129cb30 [2023-08-30 00:25:09,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:25:09,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:25:09,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:25:09,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:25:09,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:25:09,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:25:09" (1/1) ... [2023-08-30 00:25:09,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe4a5dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:09, skipping insertion in model container [2023-08-30 00:25:09,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:25:09" (1/1) ... [2023-08-30 00:25:09,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:25:09,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:25:10,124 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 00:25:10,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:25:10,151 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:25:10,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48f5fbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:10, skipping insertion in model container [2023-08-30 00:25:10,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:25:10,155 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:25:10,156 INFO L158 Benchmark]: Toolchain (without parser) took 264.04ms. Allocated memory is still 69.2MB. Free memory was 46.9MB in the beginning and 37.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:25:10,157 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 52.4MB. Free memory was 30.0MB in the beginning and 30.0MB in the end (delta: 50.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:25:10,158 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.16ms. Allocated memory is still 69.2MB. Free memory was 46.8MB in the beginning and 37.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:25:10,160 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 52.4MB. Free memory was 30.0MB in the beginning and 30.0MB in the end (delta: 50.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.16ms. Allocated memory is still 69.2MB. Free memory was 46.8MB in the beginning and 37.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:25:11,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:25:11,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:25:11,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:25:11,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:25:11,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:25:12,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:25:12,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:25:12,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:25:12,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:25:12,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:25:12,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:25:12,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:25:12,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:25:12,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:25:12,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:25:12,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:25:12,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:25:12,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:25:12,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:25:12,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:25:12,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:25:12,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:25:12,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:25:12,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:25:12,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:25:12,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:25:12,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:25:12,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:25:12,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:25:12,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:25:12,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:25:12,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:25:12,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:25:12,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:25:12,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:25:12,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:25:12,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:25:12,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:25:12,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:25:12,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:25:12,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:25:12,087 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:25:12,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:25:12,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:25:12,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:25:12,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:25:12,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:25:12,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:25:12,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:25:12,091 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:25:12,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:25:12,092 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:25:12,092 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:25:12,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:25:12,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:25:12,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:25:12,093 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:25:12,093 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:25:12,093 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:25:12,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:25:12,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:25:12,094 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:25:12,094 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:25:12,094 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:25:12,094 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:25:12,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:25:12,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:25:12,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:25:12,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:25:12,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:25:12,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:25:12,096 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:25:12,096 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:25:12,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:25:12,097 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:25:12,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:25:12,097 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:25:12,097 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:25:12,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:25:12,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:25:12,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:25:12,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:25:12,437 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:25:12,437 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:25:12,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 00:25:13,693 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:25:13,913 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:25:13,914 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 00:25:13,923 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/334430b00/3ae8b09218c249fc85019c94886d2e9e/FLAG8a82ce3ba [2023-08-30 00:25:13,941 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/334430b00/3ae8b09218c249fc85019c94886d2e9e [2023-08-30 00:25:13,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:25:13,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:25:13,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:25:13,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:25:13,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:25:13,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:25:13" (1/1) ... [2023-08-30 00:25:13,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7711c9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:13, skipping insertion in model container [2023-08-30 00:25:13,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:25:13" (1/1) ... [2023-08-30 00:25:13,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:25:13,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:25:14,138 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 00:25:14,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:25:14,160 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:25:14,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:25:14,175 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 00:25:14,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:25:14,186 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:25:14,206 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 00:25:14,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:25:14,218 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:25:14,219 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:25:14,225 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:25:14,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14 WrapperNode [2023-08-30 00:25:14,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:25:14,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:25:14,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:25:14,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:25:14,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,279 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2023-08-30 00:25:14,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:25:14,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:25:14,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:25:14,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:25:14,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,334 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:25:14,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:25:14,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:25:14,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:25:14,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (1/1) ... [2023-08-30 00:25:14,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:25:14,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:25:14,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:25:14,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:25:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:25:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:25:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:25:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:25:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:25:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:25:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:25:14,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:25:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:25:14,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:25:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:25:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:25:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:25:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:25:14,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:25:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:25:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:25:14,432 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:25:14,601 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:25:14,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:25:15,083 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:25:15,174 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:25:15,174 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:25:15,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:25:15 BoogieIcfgContainer [2023-08-30 00:25:15,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:25:15,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:25:15,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:25:15,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:25:15,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:25:13" (1/3) ... [2023-08-30 00:25:15,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16620c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:25:15, skipping insertion in model container [2023-08-30 00:25:15,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:25:14" (2/3) ... [2023-08-30 00:25:15,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16620c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:25:15, skipping insertion in model container [2023-08-30 00:25:15,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:25:15" (3/3) ... [2023-08-30 00:25:15,185 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-08-30 00:25:15,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:25:15,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 00:25:15,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:25:15,312 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:25:15,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 171 transitions, 366 flow [2023-08-30 00:25:15,410 INFO L130 PetriNetUnfolder]: 12/168 cut-off events. [2023-08-30 00:25:15,415 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:25:15,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 168 events. 12/168 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 208 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-08-30 00:25:15,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 171 transitions, 366 flow [2023-08-30 00:25:15,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 164 transitions, 346 flow [2023-08-30 00:25:15,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:25:15,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 164 transitions, 346 flow [2023-08-30 00:25:15,449 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 164 transitions, 346 flow [2023-08-30 00:25:15,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 164 transitions, 346 flow [2023-08-30 00:25:15,493 INFO L130 PetriNetUnfolder]: 12/164 cut-off events. [2023-08-30 00:25:15,493 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:25:15,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 164 events. 12/164 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-08-30 00:25:15,496 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 00:25:34,414 INFO L134 LiptonReduction]: Checked pairs total: 3510 [2023-08-30 00:25:34,414 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 00:25:34,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:25:34,430 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;@12521545, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:25:34,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-08-30 00:25:34,437 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:25:34,438 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:25:34,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:34,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:25:34,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:34,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:34,447 INFO L85 PathProgramCache]: Analyzing trace with hash 22196, now seen corresponding path program 1 times [2023-08-30 00:25:34,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:34,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918004446] [2023-08-30 00:25:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:34,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:34,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:34,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:34,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:25:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:25:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:34,839 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:25:34,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:25:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:34,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:34,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:34,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918004446] [2023-08-30 00:25:34,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918004446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:34,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:34,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:25:34,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247416437] [2023-08-30 00:25:34,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:34,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:25:34,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:34,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:25:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:25:35,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:25:35,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:35,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:35,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:25:35,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:36,027 INFO L130 PetriNetUnfolder]: 5471/6966 cut-off events. [2023-08-30 00:25:36,029 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 00:25:36,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14066 conditions, 6966 events. 5471/6966 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 31453 event pairs, 2601 based on Foata normal form. 0/1882 useless extension candidates. Maximal degree in co-relation 6096. Up to 3485 conditions per place. [2023-08-30 00:25:36,092 INFO L137 encePairwiseOnDemand]: 323/333 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 00:25:36,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2023-08-30 00:25:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-30 00:25:36,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155155155155156 [2023-08-30 00:25:36,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-30 00:25:36,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-30 00:25:36,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:36,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-30 00:25:36,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:36,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:36,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:36,131 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 515 transitions. [2023-08-30 00:25:36,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2023-08-30 00:25:36,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:25:36,140 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-08-30 00:25:36,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 00:25:36,152 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-08-30 00:25:36,152 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-08-30 00:25:36,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:36,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:36,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:25:36,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:36,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:36,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:36,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash 22269, now seen corresponding path program 1 times [2023-08-30 00:25:36,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:36,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44346834] [2023-08-30 00:25:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:36,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:36,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:36,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:36,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:25:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:25:36,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:36,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:36,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:36,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44346834] [2023-08-30 00:25:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44346834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:36,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:36,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:25:36,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984837922] [2023-08-30 00:25:36,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:36,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:25:36,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:25:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:25:36,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 333 [2023-08-30 00:25:36,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:36,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:36,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 333 [2023-08-30 00:25:36,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:37,125 INFO L130 PetriNetUnfolder]: 2765/3515 cut-off events. [2023-08-30 00:25:37,126 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 00:25:37,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 3515 events. 2765/3515 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14407 event pairs, 1310 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 7031. Up to 3488 conditions per place. [2023-08-30 00:25:37,145 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 00:25:37,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 194 flow [2023-08-30 00:25:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-30 00:25:37,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724724724724725 [2023-08-30 00:25:37,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-30 00:25:37,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-30 00:25:37,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:37,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-30 00:25:37,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:37,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:37,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:37,154 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 472 transitions. [2023-08-30 00:25:37,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 194 flow [2023-08-30 00:25:37,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:37,157 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2023-08-30 00:25:37,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-30 00:25:37,159 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2023-08-30 00:25:37,159 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2023-08-30 00:25:37,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:37,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:37,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:25:37,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:37,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:37,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:37,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash 22195, now seen corresponding path program 1 times [2023-08-30 00:25:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:37,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044286412] [2023-08-30 00:25:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:37,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:37,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:37,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:37,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:25:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:37,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:25:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:37,496 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:25:37,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:25:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:37,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:37,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044286412] [2023-08-30 00:25:37,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044286412] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:37,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:37,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:25:37,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136550788] [2023-08-30 00:25:37,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:37,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:25:37,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:37,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:25:37,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:25:37,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:25:37,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:37,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:37,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:25:37,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:38,053 INFO L130 PetriNetUnfolder]: 2765/3513 cut-off events. [2023-08-30 00:25:38,053 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 00:25:38,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7046 conditions, 3513 events. 2765/3513 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14336 event pairs, 1310 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 7032. Up to 3487 conditions per place. [2023-08-30 00:25:38,083 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 00:25:38,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 196 flow [2023-08-30 00:25:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 00:25:38,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146146146146144 [2023-08-30 00:25:38,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 00:25:38,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 00:25:38,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:38,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 00:25:38,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:38,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:38,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:38,091 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 461 transitions. [2023-08-30 00:25:38,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 196 flow [2023-08-30 00:25:38,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:25:38,096 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 110 flow [2023-08-30 00:25:38,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-30 00:25:38,098 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-08-30 00:25:38,098 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 110 flow [2023-08-30 00:25:38,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:38,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:38,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:25:38,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:38,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:38,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:38,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash 690463, now seen corresponding path program 1 times [2023-08-30 00:25:38,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:38,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857505053] [2023-08-30 00:25:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:38,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:38,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:38,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:38,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:25:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:38,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:25:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:38,496 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:25:38,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:25:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:38,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:38,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857505053] [2023-08-30 00:25:38,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857505053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:38,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:38,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:25:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252529016] [2023-08-30 00:25:38,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:38,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:25:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:25:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:25:39,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 00:25:39,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:39,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:39,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 00:25:39,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:40,631 INFO L130 PetriNetUnfolder]: 5477/6973 cut-off events. [2023-08-30 00:25:40,632 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:25:40,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 6973 events. 5477/6973 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 31535 event pairs, 2601 based on Foata normal form. 0/1889 useless extension candidates. Maximal degree in co-relation 13967. Up to 3484 conditions per place. [2023-08-30 00:25:40,671 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2023-08-30 00:25:40,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 406 flow [2023-08-30 00:25:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:25:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:25:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 900 transitions. [2023-08-30 00:25:40,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2023-08-30 00:25:40,676 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 900 transitions. [2023-08-30 00:25:40,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 900 transitions. [2023-08-30 00:25:40,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:40,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 900 transitions. [2023-08-30 00:25:40,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:40,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:40,684 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:40,684 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 110 flow. Second operand 6 states and 900 transitions. [2023-08-30 00:25:40,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 406 flow [2023-08-30 00:25:40,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:40,688 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 207 flow [2023-08-30 00:25:40,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-08-30 00:25:40,690 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-08-30 00:25:40,690 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 207 flow [2023-08-30 00:25:40,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:40,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:40,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:25:40,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:40,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:40,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:40,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash 690536, now seen corresponding path program 1 times [2023-08-30 00:25:40,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:40,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083704407] [2023-08-30 00:25:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:40,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:40,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:40,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:25:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:40,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:25:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:41,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:41,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:41,090 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 00:25:41,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2023-08-30 00:25:41,119 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:25:41,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:25:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:41,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:41,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083704407] [2023-08-30 00:25:41,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083704407] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 00:25:41,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 00:25:41,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-30 00:25:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386360656] [2023-08-30 00:25:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:25:41,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:41,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:25:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:25:41,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:25:41,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:41,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:41,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:25:41,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:42,364 INFO L130 PetriNetUnfolder]: 4373/5617 cut-off events. [2023-08-30 00:25:42,364 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 00:25:42,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11297 conditions, 5617 events. 4373/5617 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 25200 event pairs, 2060 based on Foata normal form. 0/1567 useless extension candidates. Maximal degree in co-relation 11283. Up to 5565 conditions per place. [2023-08-30 00:25:42,400 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 00:25:42,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 273 flow [2023-08-30 00:25:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-30 00:25:42,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364364364364364 [2023-08-30 00:25:42,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-30 00:25:42,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-30 00:25:42,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:42,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-30 00:25:42,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:42,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:42,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:42,445 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 207 flow. Second operand 3 states and 436 transitions. [2023-08-30 00:25:42,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 273 flow [2023-08-30 00:25:42,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 255 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:42,447 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 165 flow [2023-08-30 00:25:42,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-30 00:25:42,448 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 00:25:42,448 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 165 flow [2023-08-30 00:25:42,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:42,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:42,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:25:42,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:42,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:42,663 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:42,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash 690535, now seen corresponding path program 1 times [2023-08-30 00:25:42,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:42,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016673110] [2023-08-30 00:25:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:42,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:42,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:42,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:42,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:25:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:42,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:25:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:42,813 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 00:25:42,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 00:25:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:25:42,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:42,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:42,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016673110] [2023-08-30 00:25:42,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016673110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:42,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:42,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:25:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301433344] [2023-08-30 00:25:42,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:42,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:25:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:25:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:25:43,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:25:43,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:43,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:43,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:25:43,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:43,563 INFO L130 PetriNetUnfolder]: 3211/4203 cut-off events. [2023-08-30 00:25:43,563 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 00:25:43,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8452 conditions, 4203 events. 3211/4203 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 18852 event pairs, 1500 based on Foata normal form. 0/1307 useless extension candidates. Maximal degree in co-relation 8437. Up to 4151 conditions per place. [2023-08-30 00:25:43,582 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 00:25:43,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 227 flow [2023-08-30 00:25:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 00:25:43,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45845845845845845 [2023-08-30 00:25:43,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 00:25:43,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 00:25:43,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:43,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 00:25:43,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:43,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:43,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:43,590 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 165 flow. Second operand 3 states and 458 transitions. [2023-08-30 00:25:43,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 227 flow [2023-08-30 00:25:43,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:43,593 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 144 flow [2023-08-30 00:25:43,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 00:25:43,596 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 00:25:43,596 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 144 flow [2023-08-30 00:25:43,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:43,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:43,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:25:43,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:43,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:43,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:43,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:43,807 INFO L85 PathProgramCache]: Analyzing trace with hash 663622091, now seen corresponding path program 1 times [2023-08-30 00:25:43,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:43,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257188694] [2023-08-30 00:25:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:43,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:43,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:43,809 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:43,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:25:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:25:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:44,005 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2023-08-30 00:25:44,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2023-08-30 00:25:44,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 00:25:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:44,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:44,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:44,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257188694] [2023-08-30 00:25:44,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257188694] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:44,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:44,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:25:44,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92085577] [2023-08-30 00:25:44,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:44,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:25:44,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:25:44,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:25:44,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 00:25:44,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 132.25) internal successors, (1058), 8 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:44,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:44,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 00:25:44,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:45,741 INFO L130 PetriNetUnfolder]: 2989/3921 cut-off events. [2023-08-30 00:25:45,741 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 00:25:45,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 3921 events. 2989/3921 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 17505 event pairs, 1405 based on Foata normal form. 0/1286 useless extension candidates. Maximal degree in co-relation 7868. Up to 1955 conditions per place. [2023-08-30 00:25:45,764 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 68 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-30 00:25:45,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 356 flow [2023-08-30 00:25:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:25:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:25:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-08-30 00:25:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436036036036036 [2023-08-30 00:25:45,768 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-08-30 00:25:45,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-08-30 00:25:45,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:45,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-08-30 00:25:45,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:45,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:45,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:45,775 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 144 flow. Second operand 5 states and 726 transitions. [2023-08-30 00:25:45,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 356 flow [2023-08-30 00:25:45,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:45,780 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 145 flow [2023-08-30 00:25:45,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-30 00:25:45,782 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 00:25:45,782 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 145 flow [2023-08-30 00:25:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.25) internal successors, (1058), 8 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:45,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:45,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:25:45,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:45,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:45,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:45,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash 663622090, now seen corresponding path program 1 times [2023-08-30 00:25:45,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:45,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020316019] [2023-08-30 00:25:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:45,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:45,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:45,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:45,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:25:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:25:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:46,157 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:25:46,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 00:25:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:25:46,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:46,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:46,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020316019] [2023-08-30 00:25:46,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020316019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:46,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:46,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:25:46,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914504844] [2023-08-30 00:25:46,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:46,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:25:46,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:25:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:25:46,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:25:46,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 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) [2023-08-30 00:25:46,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:46,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:25:46,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:46,769 INFO L130 PetriNetUnfolder]: 2863/3735 cut-off events. [2023-08-30 00:25:46,769 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 00:25:46,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7520 conditions, 3735 events. 2863/3735 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 16307 event pairs, 1328 based on Foata normal form. 0/1219 useless extension candidates. Maximal degree in co-relation 7503. Up to 3683 conditions per place. [2023-08-30 00:25:46,794 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 00:25:46,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 217 flow [2023-08-30 00:25:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-30 00:25:46,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544544544544545 [2023-08-30 00:25:46,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-30 00:25:46,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-30 00:25:46,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:46,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-30 00:25:46,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:46,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:46,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:46,800 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 145 flow. Second operand 3 states and 454 transitions. [2023-08-30 00:25:46,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 217 flow [2023-08-30 00:25:46,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:25:46,802 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 138 flow [2023-08-30 00:25:46,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-30 00:25:46,804 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-08-30 00:25:46,805 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 138 flow [2023-08-30 00:25:46,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 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) [2023-08-30 00:25:46,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:46,805 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:25:46,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:47,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:47,016 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:47,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash -902882956, now seen corresponding path program 2 times [2023-08-30 00:25:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:47,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004987325] [2023-08-30 00:25:47,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:25:47,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:47,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:47,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:25:47,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:25:47,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:25:47,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:25:47,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:47,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:25:47,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:25:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:47,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:47,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004987325] [2023-08-30 00:25:47,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004987325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:47,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:47,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:25:47,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76739830] [2023-08-30 00:25:47,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:25:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:47,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:25:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:25:50,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:25:50,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 138 flow. Second operand has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:50,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:50,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:25:50,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:54,786 INFO L130 PetriNetUnfolder]: 12488/16397 cut-off events. [2023-08-30 00:25:54,787 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-08-30 00:25:54,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32862 conditions, 16397 events. 12488/16397 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 85771 event pairs, 5904 based on Foata normal form. 6/5649 useless extension candidates. Maximal degree in co-relation 32845. Up to 1838 conditions per place. [2023-08-30 00:25:54,874 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 263 selfloop transitions, 12 changer transitions 0/278 dead transitions. [2023-08-30 00:25:54,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 278 transitions, 1264 flow [2023-08-30 00:25:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:25:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:25:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1913 transitions. [2023-08-30 00:25:54,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47872872872872874 [2023-08-30 00:25:54,880 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1913 transitions. [2023-08-30 00:25:54,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1913 transitions. [2023-08-30 00:25:54,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:54,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1913 transitions. [2023-08-30 00:25:54,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.41666666666666) internal successors, (1913), 12 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:54,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:54,890 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:54,890 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 138 flow. Second operand 12 states and 1913 transitions. [2023-08-30 00:25:54,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 278 transitions, 1264 flow [2023-08-30 00:25:54,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 278 transitions, 1263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:54,898 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 235 flow [2023-08-30 00:25:54,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=235, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-08-30 00:25:54,899 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2023-08-30 00:25:54,900 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 235 flow [2023-08-30 00:25:54,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:54,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:54,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:25:54,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:55,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:55,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash -902556460, now seen corresponding path program 1 times [2023-08-30 00:25:55,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:55,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068900533] [2023-08-30 00:25:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:55,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:55,113 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:55,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:25:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:25:55,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:55,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:55,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 00:25:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:55,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:55,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068900533] [2023-08-30 00:25:55,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068900533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:55,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:55,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:25:55,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294436192] [2023-08-30 00:25:55,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:55,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:25:55,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:55,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:25:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:25:56,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 00:25:56,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 134.2) internal successors, (1342), 10 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:56,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:56,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 00:25:56,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:58,564 INFO L130 PetriNetUnfolder]: 19046/25547 cut-off events. [2023-08-30 00:25:58,564 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 00:25:58,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51395 conditions, 25547 events. 19046/25547 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1362. Compared 152096 event pairs, 5962 based on Foata normal form. 0/9605 useless extension candidates. Maximal degree in co-relation 51370. Up to 12945 conditions per place. [2023-08-30 00:25:58,839 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 116 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2023-08-30 00:25:58,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 677 flow [2023-08-30 00:25:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:25:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:25:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1316 transitions. [2023-08-30 00:25:58,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43910577243910576 [2023-08-30 00:25:58,846 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1316 transitions. [2023-08-30 00:25:58,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1316 transitions. [2023-08-30 00:25:58,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:58,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1316 transitions. [2023-08-30 00:25:58,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.22222222222223) internal successors, (1316), 9 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:58,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:58,855 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:58,855 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 235 flow. Second operand 9 states and 1316 transitions. [2023-08-30 00:25:58,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 677 flow [2023-08-30 00:25:58,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 130 transitions, 652 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:25:58,859 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 260 flow [2023-08-30 00:25:58,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2023-08-30 00:25:58,861 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 00:25:58,861 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 260 flow [2023-08-30 00:25:58,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.2) internal successors, (1342), 10 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:58,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:58,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:25:58,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:59,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:59,071 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:59,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash -902556461, now seen corresponding path program 1 times [2023-08-30 00:25:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:59,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342912269] [2023-08-30 00:25:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:59,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:59,073 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:59,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:25:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:25:59,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:59,183 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:25:59,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:25:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:25:59,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:59,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:59,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342912269] [2023-08-30 00:25:59,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342912269] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:59,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:59,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:25:59,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668280987] [2023-08-30 00:25:59,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:59,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:25:59,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:25:59,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:25:59,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 00:25:59,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:59,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:59,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 00:25:59,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:00,120 INFO L130 PetriNetUnfolder]: 8201/11381 cut-off events. [2023-08-30 00:26:00,120 INFO L131 PetriNetUnfolder]: For 2202/2599 co-relation queries the response was YES. [2023-08-30 00:26:00,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25408 conditions, 11381 events. 8201/11381 cut-off events. For 2202/2599 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 64672 event pairs, 4347 based on Foata normal form. 397/6056 useless extension candidates. Maximal degree in co-relation 25380. Up to 11188 conditions per place. [2023-08-30 00:26:00,187 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 39 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-30 00:26:00,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 49 transitions, 344 flow [2023-08-30 00:26:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:26:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:26:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-30 00:26:00,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294294294294294 [2023-08-30 00:26:00,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-30 00:26:00,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-30 00:26:00,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:00,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-30 00:26:00,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:00,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:00,200 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:00,200 INFO L175 Difference]: Start difference. First operand has 75 places, 52 transitions, 260 flow. Second operand 4 states and 572 transitions. [2023-08-30 00:26:00,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 49 transitions, 344 flow [2023-08-30 00:26:00,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 49 transitions, 327 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 00:26:00,207 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 249 flow [2023-08-30 00:26:00,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-30 00:26:00,207 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 00:26:00,207 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 249 flow [2023-08-30 00:26:00,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:00,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:00,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:00,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:00,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:00,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:00,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2085523947, now seen corresponding path program 1 times [2023-08-30 00:26:00,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091111282] [2023-08-30 00:26:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:00,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:00,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:00,420 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 (13)] Waiting until timeout for monitored process [2023-08-30 00:26:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:00,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:26:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:00,580 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:26:00,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:26:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:26:00,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:26:01,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:01,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091111282] [2023-08-30 00:26:01,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091111282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:01,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:01,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:26:01,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484204776] [2023-08-30 00:26:01,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:01,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:26:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:26:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:26:03,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 00:26:03,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:03,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:03,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 00:26:03,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:05,287 INFO L130 PetriNetUnfolder]: 15095/20066 cut-off events. [2023-08-30 00:26:05,287 INFO L131 PetriNetUnfolder]: For 2541/2541 co-relation queries the response was YES. [2023-08-30 00:26:05,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46245 conditions, 20066 events. 15095/20066 cut-off events. For 2541/2541 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 113137 event pairs, 1863 based on Foata normal form. 450/11498 useless extension candidates. Maximal degree in co-relation 46218. Up to 6066 conditions per place. [2023-08-30 00:26:05,509 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2023-08-30 00:26:05,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 630 flow [2023-08-30 00:26:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:26:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:26:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1165 transitions. [2023-08-30 00:26:05,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373123123123123 [2023-08-30 00:26:05,513 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1165 transitions. [2023-08-30 00:26:05,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1165 transitions. [2023-08-30 00:26:05,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:05,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1165 transitions. [2023-08-30 00:26:05,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 145.625) internal successors, (1165), 8 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:05,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:05,520 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:05,520 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 249 flow. Second operand 8 states and 1165 transitions. [2023-08-30 00:26:05,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 630 flow [2023-08-30 00:26:05,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 619 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 00:26:05,528 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 327 flow [2023-08-30 00:26:05,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2023-08-30 00:26:05,528 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-30 00:26:05,528 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 327 flow [2023-08-30 00:26:05,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:05,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:05,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:05,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:05,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:05,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2085683893, now seen corresponding path program 1 times [2023-08-30 00:26:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:05,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401871058] [2023-08-30 00:26:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:05,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:05,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:05,741 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:05,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:26:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:26:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:05,925 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:26:05,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:26:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:06,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:06,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:06,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401871058] [2023-08-30 00:26:06,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401871058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:06,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:06,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:26:06,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153412355] [2023-08-30 00:26:06,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:06,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:26:06,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:26:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:26:06,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 00:26:06,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 132.75) internal successors, (1062), 8 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:06,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:06,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 00:26:06,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:08,349 INFO L130 PetriNetUnfolder]: 12205/16375 cut-off events. [2023-08-30 00:26:08,349 INFO L131 PetriNetUnfolder]: For 23463/24871 co-relation queries the response was YES. [2023-08-30 00:26:08,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46037 conditions, 16375 events. 12205/16375 cut-off events. For 23463/24871 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 89298 event pairs, 6337 based on Foata normal form. 1408/11094 useless extension candidates. Maximal degree in co-relation 46005. Up to 14340 conditions per place. [2023-08-30 00:26:08,460 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-30 00:26:08,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 591 flow [2023-08-30 00:26:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:26:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:26:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 712 transitions. [2023-08-30 00:26:08,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276276276276276 [2023-08-30 00:26:08,463 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 712 transitions. [2023-08-30 00:26:08,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 712 transitions. [2023-08-30 00:26:08,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:08,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 712 transitions. [2023-08-30 00:26:08,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.4) internal successors, (712), 5 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:08,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:08,466 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:08,467 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 327 flow. Second operand 5 states and 712 transitions. [2023-08-30 00:26:08,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 591 flow [2023-08-30 00:26:08,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 552 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 00:26:08,500 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 304 flow [2023-08-30 00:26:08,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-08-30 00:26:08,500 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-08-30 00:26:08,501 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 304 flow [2023-08-30 00:26:08,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.75) internal successors, (1062), 8 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:08,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:08,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:08,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:08,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:08,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:08,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:08,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2085683891, now seen corresponding path program 1 times [2023-08-30 00:26:08,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:08,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358029867] [2023-08-30 00:26:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:08,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:08,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:08,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:26:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:26:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:08,873 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:26:08,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 00:26:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:26:08,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:26:08,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358029867] [2023-08-30 00:26:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358029867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:26:08,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:26:08,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:26:08,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170299716] [2023-08-30 00:26:08,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:26:08,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:26:08,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:08,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:26:08,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:26:08,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 00:26:08,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:08,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:08,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 00:26:08,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:10,152 INFO L130 PetriNetUnfolder]: 11603/15413 cut-off events. [2023-08-30 00:26:10,152 INFO L131 PetriNetUnfolder]: For 19602/20898 co-relation queries the response was YES. [2023-08-30 00:26:10,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40574 conditions, 15413 events. 11603/15413 cut-off events. For 19602/20898 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 81832 event pairs, 5913 based on Foata normal form. 1296/10436 useless extension candidates. Maximal degree in co-relation 40542. Up to 15251 conditions per place. [2023-08-30 00:26:10,238 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 00:26:10,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 50 transitions, 392 flow [2023-08-30 00:26:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:26:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:26:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-30 00:26:10,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843843843843844 [2023-08-30 00:26:10,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-30 00:26:10,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-30 00:26:10,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:10,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-30 00:26:10,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:10,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:10,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:10,254 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 304 flow. Second operand 3 states and 438 transitions. [2023-08-30 00:26:10,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 50 transitions, 392 flow [2023-08-30 00:26:10,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 50 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:26:10,282 INFO L231 Difference]: Finished difference. Result has 77 places, 50 transitions, 297 flow [2023-08-30 00:26:10,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=77, PETRI_TRANSITIONS=50} [2023-08-30 00:26:10,284 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2023-08-30 00:26:10,284 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 50 transitions, 297 flow [2023-08-30 00:26:10,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:10,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:10,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:10,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:10,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:10,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:10,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash 231686421, now seen corresponding path program 1 times [2023-08-30 00:26:10,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:10,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569605179] [2023-08-30 00:26:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:10,495 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:10,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:10,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:10,496 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 (16)] Waiting until timeout for monitored process [2023-08-30 00:26:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:26:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:10,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:10,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 00:26:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:10,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:10,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569605179] [2023-08-30 00:26:10,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569605179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:10,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:10,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:26:10,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806377796] [2023-08-30 00:26:10,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:10,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:26:10,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:26:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:26:12,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 00:26:12,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 50 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 134.6) internal successors, (1346), 10 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:12,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:12,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 00:26:12,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:14,555 INFO L130 PetriNetUnfolder]: 15419/21137 cut-off events. [2023-08-30 00:26:14,555 INFO L131 PetriNetUnfolder]: For 32615/34703 co-relation queries the response was YES. [2023-08-30 00:26:14,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57097 conditions, 21137 events. 15419/21137 cut-off events. For 32615/34703 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 122514 event pairs, 5117 based on Foata normal form. 2088/16258 useless extension candidates. Maximal degree in co-relation 57065. Up to 12297 conditions per place. [2023-08-30 00:26:14,664 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2023-08-30 00:26:14,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 825 flow [2023-08-30 00:26:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:26:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:26:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1284 transitions. [2023-08-30 00:26:14,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42842842842842843 [2023-08-30 00:26:14,668 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1284 transitions. [2023-08-30 00:26:14,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1284 transitions. [2023-08-30 00:26:14,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:14,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1284 transitions. [2023-08-30 00:26:14,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:14,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:14,676 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:14,676 INFO L175 Difference]: Start difference. First operand has 77 places, 50 transitions, 297 flow. Second operand 9 states and 1284 transitions. [2023-08-30 00:26:14,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 825 flow [2023-08-30 00:26:14,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:26:14,706 INFO L231 Difference]: Finished difference. Result has 86 places, 53 transitions, 338 flow [2023-08-30 00:26:14,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=86, PETRI_TRANSITIONS=53} [2023-08-30 00:26:14,707 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2023-08-30 00:26:14,707 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 53 transitions, 338 flow [2023-08-30 00:26:14,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.6) internal successors, (1346), 10 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:14,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:14,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:14,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:14,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:14,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:14,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1407651807, now seen corresponding path program 1 times [2023-08-30 00:26:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:14,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537579810] [2023-08-30 00:26:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:14,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:14,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:14,921 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:14,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:26:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:26:15,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:15,078 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:26:15,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:26:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:26:15,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:26:15,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:15,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537579810] [2023-08-30 00:26:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537579810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:15,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:15,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:26:15,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070037064] [2023-08-30 00:26:15,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:26:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:26:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:26:17,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 00:26:17,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 53 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:17,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:17,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 00:26:17,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:21,872 INFO L130 PetriNetUnfolder]: 29495/39893 cut-off events. [2023-08-30 00:26:21,872 INFO L131 PetriNetUnfolder]: For 69831/73719 co-relation queries the response was YES. [2023-08-30 00:26:22,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117691 conditions, 39893 events. 29495/39893 cut-off events. For 69831/73719 co-relation queries the response was YES. Maximal size of possible extension queue 1693. Compared 245968 event pairs, 3843 based on Foata normal form. 3888/34529 useless extension candidates. Maximal degree in co-relation 117656. Up to 10063 conditions per place. [2023-08-30 00:26:22,282 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2023-08-30 00:26:22,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 162 transitions, 1142 flow [2023-08-30 00:26:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:26:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:26:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1283 transitions. [2023-08-30 00:26:22,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42809476142809477 [2023-08-30 00:26:22,286 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1283 transitions. [2023-08-30 00:26:22,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1283 transitions. [2023-08-30 00:26:22,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:22,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1283 transitions. [2023-08-30 00:26:22,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.55555555555554) internal successors, (1283), 9 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:22,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:22,293 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:22,293 INFO L175 Difference]: Start difference. First operand has 86 places, 53 transitions, 338 flow. Second operand 9 states and 1283 transitions. [2023-08-30 00:26:22,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 162 transitions, 1142 flow [2023-08-30 00:26:22,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:26:22,345 INFO L231 Difference]: Finished difference. Result has 94 places, 58 transitions, 409 flow [2023-08-30 00:26:22,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=58} [2023-08-30 00:26:22,345 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2023-08-30 00:26:22,345 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 58 transitions, 409 flow [2023-08-30 00:26:22,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:22,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:22,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:22,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:22,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:22,553 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:22,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash -682549601, now seen corresponding path program 1 times [2023-08-30 00:26:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:22,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125433630] [2023-08-30 00:26:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:22,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:22,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:22,555 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:22,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:26:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:26:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:22,728 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:26:22,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:26:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:23,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:23,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:23,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125433630] [2023-08-30 00:26:23,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125433630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:23,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:23,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:26:23,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112369683] [2023-08-30 00:26:23,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:23,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:26:23,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:23,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:26:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:26:27,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 333 [2023-08-30 00:26:27,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 58 transitions, 409 flow. Second operand has 10 states, 10 states have (on average 128.0) internal successors, (1280), 10 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:27,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:27,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 333 [2023-08-30 00:26:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:34,523 INFO L130 PetriNetUnfolder]: 26371/37035 cut-off events. [2023-08-30 00:26:34,524 INFO L131 PetriNetUnfolder]: For 110569/117413 co-relation queries the response was YES. [2023-08-30 00:26:34,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133340 conditions, 37035 events. 26371/37035 cut-off events. For 110569/117413 co-relation queries the response was YES. Maximal size of possible extension queue 1326. Compared 228479 event pairs, 17163 based on Foata normal form. 6844/39544 useless extension candidates. Maximal degree in co-relation 133301. Up to 22069 conditions per place. [2023-08-30 00:26:34,908 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 156 selfloop transitions, 15 changer transitions 0/175 dead transitions. [2023-08-30 00:26:34,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 175 transitions, 1396 flow [2023-08-30 00:26:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:26:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:26:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1493 transitions. [2023-08-30 00:26:34,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075894075894076 [2023-08-30 00:26:34,913 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1493 transitions. [2023-08-30 00:26:34,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1493 transitions. [2023-08-30 00:26:34,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:34,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1493 transitions. [2023-08-30 00:26:34,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 135.72727272727272) internal successors, (1493), 11 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:34,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:34,921 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:34,921 INFO L175 Difference]: Start difference. First operand has 94 places, 58 transitions, 409 flow. Second operand 11 states and 1493 transitions. [2023-08-30 00:26:34,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 175 transitions, 1396 flow [2023-08-30 00:26:35,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 175 transitions, 1312 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-08-30 00:26:35,011 INFO L231 Difference]: Finished difference. Result has 103 places, 62 transitions, 438 flow [2023-08-30 00:26:35,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=438, PETRI_PLACES=103, PETRI_TRANSITIONS=62} [2023-08-30 00:26:35,011 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2023-08-30 00:26:35,011 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 62 transitions, 438 flow [2023-08-30 00:26:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.0) internal successors, (1280), 10 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:35,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:35,012 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:35,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:35,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:35,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:35,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1149885804, now seen corresponding path program 2 times [2023-08-30 00:26:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263518246] [2023-08-30 00:26:35,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:26:35,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:35,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:35,216 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:35,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:26:35,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:26:35,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:26:35,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:26:35,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:35,394 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:26:35,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:26:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:35,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:36,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:36,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263518246] [2023-08-30 00:26:36,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263518246] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:36,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:36,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:26:36,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686020271] [2023-08-30 00:26:36,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:36,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:26:36,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:36,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:26:36,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:26:45,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 00:26:45,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 62 transitions, 438 flow. Second operand has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:45,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:45,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 00:26:45,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:58,180 INFO L130 PetriNetUnfolder]: 30193/41898 cut-off events. [2023-08-30 00:26:58,180 INFO L131 PetriNetUnfolder]: For 98371/102250 co-relation queries the response was YES. [2023-08-30 00:26:58,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157733 conditions, 41898 events. 30193/41898 cut-off events. For 98371/102250 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 275645 event pairs, 9493 based on Foata normal form. 4225/42241 useless extension candidates. Maximal degree in co-relation 157692. Up to 15994 conditions per place. [2023-08-30 00:26:58,640 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 309 selfloop transitions, 24 changer transitions 0/338 dead transitions. [2023-08-30 00:26:58,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 338 transitions, 2472 flow [2023-08-30 00:26:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:26:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:26:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2639 transitions. [2023-08-30 00:26:58,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41710131183815397 [2023-08-30 00:26:58,648 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2639 transitions. [2023-08-30 00:26:58,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2639 transitions. [2023-08-30 00:26:58,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:58,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2639 transitions. [2023-08-30 00:26:58,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 138.89473684210526) internal successors, (2639), 19 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:58,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:58,661 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:58,661 INFO L175 Difference]: Start difference. First operand has 103 places, 62 transitions, 438 flow. Second operand 19 states and 2639 transitions. [2023-08-30 00:26:58,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 338 transitions, 2472 flow [2023-08-30 00:26:59,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 338 transitions, 2429 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-30 00:26:59,202 INFO L231 Difference]: Finished difference. Result has 120 places, 74 transitions, 567 flow [2023-08-30 00:26:59,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=567, PETRI_PLACES=120, PETRI_TRANSITIONS=74} [2023-08-30 00:26:59,202 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2023-08-30 00:26:59,203 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 74 transitions, 567 flow [2023-08-30 00:26:59,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:59,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:59,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:59,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:59,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:59,404 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:59,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:59,404 INFO L85 PathProgramCache]: Analyzing trace with hash 315801535, now seen corresponding path program 1 times [2023-08-30 00:26:59,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:59,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035144409] [2023-08-30 00:26:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:59,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:59,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:59,406 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:59,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:26:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:59,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:26:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:59,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:27:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:00,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:00,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035144409] [2023-08-30 00:27:00,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035144409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:27:00,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:27:00,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:27:00,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6802215] [2023-08-30 00:27:00,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:27:00,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:27:00,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:27:00,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:27:00,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 00:27:00,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 74 transitions, 567 flow. Second operand has 12 states, 12 states have (on average 134.83333333333334) internal successors, (1618), 12 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:00,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:00,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 00:27:00,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:04,857 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2023-08-30 00:27:04,858 INFO L131 PetriNetUnfolder]: For 127945/133457 co-relation queries the response was YES. [2023-08-30 00:27:05,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125681 conditions, 30859 events. 21755/30859 cut-off events. For 127945/133457 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 192098 event pairs, 11742 based on Foata normal form. 5600/34791 useless extension candidates. Maximal degree in co-relation 125636. Up to 22588 conditions per place. [2023-08-30 00:27:05,276 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2023-08-30 00:27:05,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 160 transitions, 1399 flow [2023-08-30 00:27:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:27:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:27:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1412 transitions. [2023-08-30 00:27:05,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424024024024024 [2023-08-30 00:27:05,284 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1412 transitions. [2023-08-30 00:27:05,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1412 transitions. [2023-08-30 00:27:05,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:05,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1412 transitions. [2023-08-30 00:27:05,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.2) internal successors, (1412), 10 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:05,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:05,291 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:05,291 INFO L175 Difference]: Start difference. First operand has 120 places, 74 transitions, 567 flow. Second operand 10 states and 1412 transitions. [2023-08-30 00:27:05,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 160 transitions, 1399 flow [2023-08-30 00:27:05,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 160 transitions, 1320 flow, removed 29 selfloop flow, removed 6 redundant places. [2023-08-30 00:27:05,529 INFO L231 Difference]: Finished difference. Result has 125 places, 75 transitions, 564 flow [2023-08-30 00:27:05,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=564, PETRI_PLACES=125, PETRI_TRANSITIONS=75} [2023-08-30 00:27:05,530 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 00:27:05,530 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 75 transitions, 564 flow [2023-08-30 00:27:05,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.83333333333334) internal successors, (1618), 12 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:05,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:05,530 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:27:05,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-30 00:27:05,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:05,731 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:27:05,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash 709403669, now seen corresponding path program 2 times [2023-08-30 00:27:05,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:05,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365648864] [2023-08-30 00:27:05,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:27:05,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:05,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:05,733 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:05,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:27:05,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:27:05,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:27:05,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:27:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:05,962 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:27:05,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:27:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:06,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:27:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:07,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365648864] [2023-08-30 00:27:07,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365648864] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:27:07,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:27:07,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:27:07,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031627177] [2023-08-30 00:27:07,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:27:07,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:27:07,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:27:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:27:15,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 333 [2023-08-30 00:27:15,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 75 transitions, 564 flow. Second operand has 18 states, 18 states have (on average 126.33333333333333) internal successors, (2274), 18 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:15,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:15,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 333 [2023-08-30 00:27:15,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:29,815 INFO L130 PetriNetUnfolder]: 25495/35088 cut-off events. [2023-08-30 00:27:29,815 INFO L131 PetriNetUnfolder]: For 150099/153829 co-relation queries the response was YES. [2023-08-30 00:27:30,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155060 conditions, 35088 events. 25495/35088 cut-off events. For 150099/153829 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 221720 event pairs, 8394 based on Foata normal form. 3932/35562 useless extension candidates. Maximal degree in co-relation 155012. Up to 15754 conditions per place. [2023-08-30 00:27:30,209 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 319 selfloop transitions, 24 changer transitions 0/349 dead transitions. [2023-08-30 00:27:30,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 349 transitions, 2927 flow [2023-08-30 00:27:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:27:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:27:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2595 transitions. [2023-08-30 00:27:30,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41014698909435754 [2023-08-30 00:27:30,214 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2595 transitions. [2023-08-30 00:27:30,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2595 transitions. [2023-08-30 00:27:30,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:30,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2595 transitions. [2023-08-30 00:27:30,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 136.57894736842104) internal successors, (2595), 19 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:30,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:30,225 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:30,225 INFO L175 Difference]: Start difference. First operand has 125 places, 75 transitions, 564 flow. Second operand 19 states and 2595 transitions. [2023-08-30 00:27:30,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 349 transitions, 2927 flow [2023-08-30 00:27:30,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 349 transitions, 2908 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 00:27:30,588 INFO L231 Difference]: Finished difference. Result has 144 places, 87 transitions, 704 flow [2023-08-30 00:27:30,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=704, PETRI_PLACES=144, PETRI_TRANSITIONS=87} [2023-08-30 00:27:30,589 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 87 predicate places. [2023-08-30 00:27:30,590 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 87 transitions, 704 flow [2023-08-30 00:27:30,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 126.33333333333333) internal successors, (2274), 18 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:30,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:30,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:27:30,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:30,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:30,801 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:27:30,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -254601804, now seen corresponding path program 2 times [2023-08-30 00:27:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125221237] [2023-08-30 00:27:30,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:27:30,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:30,803 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:30,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:27:30,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:27:30,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:27:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:27:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:31,037 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:27:31,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:27:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:31,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:27:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:32,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:32,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125221237] [2023-08-30 00:27:32,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125221237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:27:32,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:27:32,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 00:27:32,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892112455] [2023-08-30 00:27:32,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:27:32,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:27:32,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:27:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:27:46,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 333 [2023-08-30 00:27:46,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 87 transitions, 704 flow. Second operand has 14 states, 14 states have (on average 126.71428571428571) internal successors, (1774), 14 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:46,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:46,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 333 [2023-08-30 00:27:46,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:00,020 INFO L130 PetriNetUnfolder]: 32725/46053 cut-off events. [2023-08-30 00:28:00,020 INFO L131 PetriNetUnfolder]: For 237385/245433 co-relation queries the response was YES. [2023-08-30 00:28:00,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214149 conditions, 46053 events. 32725/46053 cut-off events. For 237385/245433 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 301783 event pairs, 12293 based on Foata normal form. 8448/52355 useless extension candidates. Maximal degree in co-relation 214095. Up to 11568 conditions per place. [2023-08-30 00:28:00,752 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 383 selfloop transitions, 25 changer transitions 0/414 dead transitions. [2023-08-30 00:28:00,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 414 transitions, 3909 flow [2023-08-30 00:28:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:28:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:28:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2566 transitions. [2023-08-30 00:28:00,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40556345819503714 [2023-08-30 00:28:00,756 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2566 transitions. [2023-08-30 00:28:00,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2566 transitions. [2023-08-30 00:28:00,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:00,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2566 transitions. [2023-08-30 00:28:00,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.05263157894737) internal successors, (2566), 19 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:00,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:00,763 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:00,763 INFO L175 Difference]: Start difference. First operand has 144 places, 87 transitions, 704 flow. Second operand 19 states and 2566 transitions. [2023-08-30 00:28:00,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 414 transitions, 3909 flow [2023-08-30 00:28:01,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 414 transitions, 3729 flow, removed 83 selfloop flow, removed 5 redundant places. [2023-08-30 00:28:01,526 INFO L231 Difference]: Finished difference. Result has 161 places, 98 transitions, 839 flow [2023-08-30 00:28:01,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=839, PETRI_PLACES=161, PETRI_TRANSITIONS=98} [2023-08-30 00:28:01,526 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 104 predicate places. [2023-08-30 00:28:01,527 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 98 transitions, 839 flow [2023-08-30 00:28:01,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.71428571428571) internal successors, (1774), 14 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:01,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:01,527 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:28:01,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-08-30 00:28:01,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:01,728 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:28:01,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash 269576596, now seen corresponding path program 3 times [2023-08-30 00:28:01,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:01,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181924091] [2023-08-30 00:28:01,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:28:01,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:01,730 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:01,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:28:01,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:28:01,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:28:01,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:01,981 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:01,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:02,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:04,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181924091] [2023-08-30 00:28:04,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181924091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:04,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:04,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:28:04,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771221157] [2023-08-30 00:28:04,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:04,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:28:04,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:28:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:28:15,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:28:15,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 98 transitions, 839 flow. Second operand has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:15,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:15,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:28:15,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:43,014 INFO L130 PetriNetUnfolder]: 66073/90961 cut-off events. [2023-08-30 00:28:43,015 INFO L131 PetriNetUnfolder]: For 645991/663867 co-relation queries the response was YES. [2023-08-30 00:28:43,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473933 conditions, 90961 events. 66073/90961 cut-off events. For 645991/663867 co-relation queries the response was YES. Maximal size of possible extension queue 2391. Compared 595755 event pairs, 43743 based on Foata normal form. 17888/108554 useless extension candidates. Maximal degree in co-relation 473874. Up to 26277 conditions per place. [2023-08-30 00:28:44,329 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 726 selfloop transitions, 24 changer transitions 0/761 dead transitions. [2023-08-30 00:28:44,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 761 transitions, 6947 flow [2023-08-30 00:28:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:28:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:28:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3759 transitions. [2023-08-30 00:28:44,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47034534534534533 [2023-08-30 00:28:44,333 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3759 transitions. [2023-08-30 00:28:44,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3759 transitions. [2023-08-30 00:28:44,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:44,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3759 transitions. [2023-08-30 00:28:44,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 156.625) internal successors, (3759), 24 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:44,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:44,342 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:44,342 INFO L175 Difference]: Start difference. First operand has 161 places, 98 transitions, 839 flow. Second operand 24 states and 3759 transitions. [2023-08-30 00:28:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 761 transitions, 6947 flow [2023-08-30 00:28:52,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 761 transitions, 6888 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-08-30 00:28:52,452 INFO L231 Difference]: Finished difference. Result has 188 places, 111 transitions, 991 flow [2023-08-30 00:28:52,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=991, PETRI_PLACES=188, PETRI_TRANSITIONS=111} [2023-08-30 00:28:52,453 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 131 predicate places. [2023-08-30 00:28:52,453 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 111 transitions, 991 flow [2023-08-30 00:28:52,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:52,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:52,454 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 00:28:52,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:52,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:52,655 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:28:52,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1857121760, now seen corresponding path program 3 times [2023-08-30 00:28:52,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:52,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084266905] [2023-08-30 00:28:52,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:28:52,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:52,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:52,657 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:52,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:28:52,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:28:52,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:28:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:53,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:53,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:53,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084266905] [2023-08-30 00:28:53,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084266905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:53,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:53,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 00:28:53,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376865936] [2023-08-30 00:28:53,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:53,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:28:53,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:28:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:28:54,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 00:28:54,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 111 transitions, 991 flow. Second operand has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:54,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:54,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 00:28:54,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:29:11,677 INFO L130 PetriNetUnfolder]: 69341/95476 cut-off events. [2023-08-30 00:29:11,677 INFO L131 PetriNetUnfolder]: For 636227/645871 co-relation queries the response was YES. [2023-08-30 00:29:12,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493074 conditions, 95476 events. 69341/95476 cut-off events. For 636227/645871 co-relation queries the response was YES. Maximal size of possible extension queue 2397. Compared 643132 event pairs, 24053 based on Foata normal form. 10236/104288 useless extension candidates. Maximal degree in co-relation 493003. Up to 46393 conditions per place. [2023-08-30 00:29:13,461 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 523 selfloop transitions, 37 changer transitions 0/568 dead transitions. [2023-08-30 00:29:13,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 568 transitions, 5187 flow [2023-08-30 00:29:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 00:29:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 00:29:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3650 transitions. [2023-08-30 00:29:13,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843843843843844 [2023-08-30 00:29:13,465 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3650 transitions. [2023-08-30 00:29:13,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3650 transitions. [2023-08-30 00:29:13,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:29:13,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3650 transitions. [2023-08-30 00:29:13,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:13,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 333.0) internal successors, (8658), 26 states have internal predecessors, (8658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:13,474 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 333.0) internal successors, (8658), 26 states have internal predecessors, (8658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:13,475 INFO L175 Difference]: Start difference. First operand has 188 places, 111 transitions, 991 flow. Second operand 25 states and 3650 transitions. [2023-08-30 00:29:13,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 568 transitions, 5187 flow [2023-08-30 00:29:20,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 568 transitions, 5139 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 00:29:20,386 INFO L231 Difference]: Finished difference. Result has 209 places, 123 transitions, 1171 flow [2023-08-30 00:29:20,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1171, PETRI_PLACES=209, PETRI_TRANSITIONS=123} [2023-08-30 00:29:20,387 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 152 predicate places. [2023-08-30 00:29:20,387 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 123 transitions, 1171 flow [2023-08-30 00:29:20,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:20,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:29:20,388 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:29:20,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:29:20,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:20,589 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:29:20,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:29:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1135506602, now seen corresponding path program 2 times [2023-08-30 00:29:20,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:29:20,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763092636] [2023-08-30 00:29:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:29:20,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:20,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:29:20,591 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:29:20,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:29:20,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:29:20,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:29:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:29:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:29:20,762 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:29:20,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:29:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:29:20,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:29:20,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:29:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763092636] [2023-08-30 00:29:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763092636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:29:20,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:29:20,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:29:20,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786660341] [2023-08-30 00:29:20,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:29:20,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:29:20,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:29:20,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:29:20,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:29:21,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 00:29:21,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 123 transitions, 1171 flow. Second operand has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:21,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:29:21,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 00:29:21,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:29:35,717 INFO L130 PetriNetUnfolder]: 66187/93179 cut-off events. [2023-08-30 00:29:35,717 INFO L131 PetriNetUnfolder]: For 767676/784748 co-relation queries the response was YES. [2023-08-30 00:29:37,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497178 conditions, 93179 events. 66187/93179 cut-off events. For 767676/784748 co-relation queries the response was YES. Maximal size of possible extension queue 1853. Compared 616213 event pairs, 40351 based on Foata normal form. 25256/118332 useless extension candidates. Maximal degree in co-relation 497099. Up to 77391 conditions per place. [2023-08-30 00:29:37,525 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 153 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2023-08-30 00:29:37,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 180 transitions, 2029 flow [2023-08-30 00:29:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:29:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:29:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 695 transitions. [2023-08-30 00:29:37,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174174174174174 [2023-08-30 00:29:37,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 695 transitions. [2023-08-30 00:29:37,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 695 transitions. [2023-08-30 00:29:37,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:29:37,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 695 transitions. [2023-08-30 00:29:37,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:37,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:37,530 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:37,530 INFO L175 Difference]: Start difference. First operand has 209 places, 123 transitions, 1171 flow. Second operand 5 states and 695 transitions. [2023-08-30 00:29:37,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 180 transitions, 2029 flow [2023-08-30 00:29:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 180 transitions, 1945 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-30 00:29:44,703 INFO L231 Difference]: Finished difference. Result has 204 places, 123 transitions, 1172 flow [2023-08-30 00:29:44,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1172, PETRI_PLACES=204, PETRI_TRANSITIONS=123} [2023-08-30 00:29:44,704 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 147 predicate places. [2023-08-30 00:29:44,704 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 123 transitions, 1172 flow [2023-08-30 00:29:44,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:44,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:29:44,704 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:29:44,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:29:44,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:44,905 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:29:44,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:29:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2114886102, now seen corresponding path program 3 times [2023-08-30 00:29:44,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:29:44,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282451312] [2023-08-30 00:29:44,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:29:44,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:29:44,907 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:29:44,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 00:29:45,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:29:45,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:29:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:29:45,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:29:45,192 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:29:45,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:29:45,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 00:29:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:29:45,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:29:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:29:45,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:29:45,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282451312] [2023-08-30 00:29:45,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282451312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:29:45,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:29:45,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 00:29:45,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342220446] [2023-08-30 00:29:45,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:29:45,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:29:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:29:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:29:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:29:49,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 00:29:49,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 123 transitions, 1172 flow. Second operand has 14 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:49,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:29:49,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 00:29:49,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:30:04,461 INFO L130 PetriNetUnfolder]: 58986/83098 cut-off events. [2023-08-30 00:30:04,461 INFO L131 PetriNetUnfolder]: For 915320/938624 co-relation queries the response was YES. [2023-08-30 00:30:05,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466520 conditions, 83098 events. 58986/83098 cut-off events. For 915320/938624 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 550948 event pairs, 26081 based on Foata normal form. 23356/106228 useless extension candidates. Maximal degree in co-relation 466440. Up to 48947 conditions per place. [2023-08-30 00:30:05,989 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 218 selfloop transitions, 21 changer transitions 0/249 dead transitions. [2023-08-30 00:30:05,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 249 transitions, 2448 flow [2023-08-30 00:30:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:30:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:30:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1908 transitions. [2023-08-30 00:30:05,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092664092664093 [2023-08-30 00:30:05,992 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1908 transitions. [2023-08-30 00:30:05,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1908 transitions. [2023-08-30 00:30:05,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:30:05,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1908 transitions. [2023-08-30 00:30:05,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.28571428571428) internal successors, (1908), 14 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:05,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:05,996 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:05,996 INFO L175 Difference]: Start difference. First operand has 204 places, 123 transitions, 1172 flow. Second operand 14 states and 1908 transitions. [2023-08-30 00:30:05,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 249 transitions, 2448 flow [2023-08-30 00:30:09,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 249 transitions, 2372 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 00:30:09,012 INFO L231 Difference]: Finished difference. Result has 218 places, 127 transitions, 1230 flow [2023-08-30 00:30:09,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1230, PETRI_PLACES=218, PETRI_TRANSITIONS=127} [2023-08-30 00:30:09,012 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 161 predicate places. [2023-08-30 00:30:09,013 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 127 transitions, 1230 flow [2023-08-30 00:30:09,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:09,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:30:09,013 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2023-08-30 00:30:09,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:30:09,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:30:09,214 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:30:09,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:30:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2028591788, now seen corresponding path program 4 times [2023-08-30 00:30:09,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:30:09,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987569347] [2023-08-30 00:30:09,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:30:09,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:30:09,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:30:09,216 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:30:09,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 00:30:09,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:30:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:30:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:30:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:30:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:30:09,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:30:10,370 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 38 treesize of output 32 [2023-08-30 00:30:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:30:11,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:30:11,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987569347] [2023-08-30 00:30:11,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987569347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:30:11,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:30:11,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-08-30 00:30:11,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875684627] [2023-08-30 00:30:11,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:30:11,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:30:11,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:30:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:30:11,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:30:22,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:30:22,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 127 transitions, 1230 flow. Second operand has 26 states, 26 states have (on average 133.07692307692307) internal successors, (3460), 26 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:22,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:30:22,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:30:22,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:30:52,398 INFO L130 PetriNetUnfolder]: 83447/120976 cut-off events. [2023-08-30 00:30:52,398 INFO L131 PetriNetUnfolder]: For 988052/1020830 co-relation queries the response was YES. [2023-08-30 00:30:54,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651552 conditions, 120976 events. 83447/120976 cut-off events. For 988052/1020830 co-relation queries the response was YES. Maximal size of possible extension queue 2632. Compared 906040 event pairs, 20955 based on Foata normal form. 34532/155390 useless extension candidates. Maximal degree in co-relation 651468. Up to 28909 conditions per place. [2023-08-30 00:30:55,135 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 878 selfloop transitions, 47 changer transitions 0/934 dead transitions. [2023-08-30 00:30:55,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 934 transitions, 8562 flow [2023-08-30 00:30:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 00:30:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 00:30:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6199 transitions. [2023-08-30 00:30:55,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44322894322894324 [2023-08-30 00:30:55,143 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6199 transitions. [2023-08-30 00:30:55,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6199 transitions. [2023-08-30 00:30:55,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:30:55,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6199 transitions. [2023-08-30 00:30:55,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 147.5952380952381) internal successors, (6199), 42 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:55,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 333.0) internal successors, (14319), 43 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:55,163 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 333.0) internal successors, (14319), 43 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:55,163 INFO L175 Difference]: Start difference. First operand has 218 places, 127 transitions, 1230 flow. Second operand 42 states and 6199 transitions. [2023-08-30 00:30:55,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 934 transitions, 8562 flow [2023-08-30 00:31:05,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 934 transitions, 8549 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 00:31:05,678 INFO L231 Difference]: Finished difference. Result has 259 places, 155 transitions, 1648 flow [2023-08-30 00:31:05,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1648, PETRI_PLACES=259, PETRI_TRANSITIONS=155} [2023-08-30 00:31:05,679 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 202 predicate places. [2023-08-30 00:31:05,679 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 155 transitions, 1648 flow [2023-08-30 00:31:05,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 133.07692307692307) internal successors, (3460), 26 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:05,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:31:05,680 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:31:05,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:31:05,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:31:05,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:31:05,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:31:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1999480833, now seen corresponding path program 3 times [2023-08-30 00:31:05,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:31:05,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859244998] [2023-08-30 00:31:05,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:31:05,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:31:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:31:05,882 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:31:05,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 00:31:06,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:31:06,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:31:06,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:31:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:31:06,130 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:31:06,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:31:06,328 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 7 treesize of output 5 [2023-08-30 00:31:06,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 12 [2023-08-30 00:31:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:31:06,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:31:06,723 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 8 treesize of output 6 [2023-08-30 00:31:06,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 11 [2023-08-30 00:31:06,755 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 00:31:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:31:08,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:31:08,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859244998] [2023-08-30 00:31:08,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859244998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:31:08,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:31:08,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:31:08,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259766403] [2023-08-30 00:31:08,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:31:08,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:31:08,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:31:08,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:31:08,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:31:15,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:31:18,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 333 [2023-08-30 00:31:18,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 155 transitions, 1648 flow. Second operand has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:18,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:31:18,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 333 [2023-08-30 00:31:18,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:31:46,790 INFO L130 PetriNetUnfolder]: 107871/157243 cut-off events. [2023-08-30 00:31:46,790 INFO L131 PetriNetUnfolder]: For 1403388/1426948 co-relation queries the response was YES. [2023-08-30 00:31:49,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874730 conditions, 157243 events. 107871/157243 cut-off events. For 1403388/1426948 co-relation queries the response was YES. Maximal size of possible extension queue 3207. Compared 1215201 event pairs, 16193 based on Foata normal form. 36696/193836 useless extension candidates. Maximal degree in co-relation 874640. Up to 54744 conditions per place. [2023-08-30 00:31:50,402 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 362 selfloop transitions, 24 changer transitions 0/399 dead transitions. [2023-08-30 00:31:50,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 399 transitions, 4900 flow [2023-08-30 00:31:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:31:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:31:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 968 transitions. [2023-08-30 00:31:50,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41527241527241526 [2023-08-30 00:31:50,405 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 968 transitions. [2023-08-30 00:31:50,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 968 transitions. [2023-08-30 00:31:50,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:31:50,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 968 transitions. [2023-08-30 00:31:50,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:50,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:50,407 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:50,407 INFO L175 Difference]: Start difference. First operand has 259 places, 155 transitions, 1648 flow. Second operand 7 states and 968 transitions. [2023-08-30 00:31:50,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 399 transitions, 4900 flow [2023-08-30 00:32:07,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 399 transitions, 4071 flow, removed 244 selfloop flow, removed 22 redundant places. [2023-08-30 00:32:07,688 INFO L231 Difference]: Finished difference. Result has 243 places, 155 transitions, 1409 flow [2023-08-30 00:32:07,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1409, PETRI_PLACES=243, PETRI_TRANSITIONS=155} [2023-08-30 00:32:07,688 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 186 predicate places. [2023-08-30 00:32:07,688 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 155 transitions, 1409 flow [2023-08-30 00:32:07,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:07,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:32:07,689 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:32:07,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 00:32:07,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:32:07,889 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:32:07,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:32:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash -190274720, now seen corresponding path program 4 times [2023-08-30 00:32:07,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:32:07,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873284456] [2023-08-30 00:32:07,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:32:07,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:32:07,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:32:07,892 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:32:07,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 00:32:08,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:32:08,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:32:08,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:32:08,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:32:08,113 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:32:08,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:32:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:32:08,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:32:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:32:10,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:32:10,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873284456] [2023-08-30 00:32:10,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873284456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:32:10,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:32:10,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:32:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134489850] [2023-08-30 00:32:10,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:32:10,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:32:10,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:32:10,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:32:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:32:31,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 00:32:31,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 155 transitions, 1409 flow. Second operand has 24 states, 24 states have (on average 129.25) internal successors, (3102), 24 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:31,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:32:31,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 00:32:31,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:33:51,505 INFO L130 PetriNetUnfolder]: 178710/254573 cut-off events. [2023-08-30 00:33:51,506 INFO L131 PetriNetUnfolder]: For 2505194/2549021 co-relation queries the response was YES. [2023-08-30 00:33:56,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1428054 conditions, 254573 events. 178710/254573 cut-off events. For 2505194/2549021 co-relation queries the response was YES. Maximal size of possible extension queue 4847. Compared 1974721 event pairs, 19126 based on Foata normal form. 64371/318777 useless extension candidates. Maximal degree in co-relation 1427969. Up to 59921 conditions per place. [2023-08-30 00:33:57,553 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 932 selfloop transitions, 49 changer transitions 0/995 dead transitions. [2023-08-30 00:33:57,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 995 transitions, 9389 flow [2023-08-30 00:33:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:33:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:33:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5009 transitions. [2023-08-30 00:33:57,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178345011678345 [2023-08-30 00:33:57,559 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5009 transitions. [2023-08-30 00:33:57,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5009 transitions. [2023-08-30 00:33:57,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:33:57,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5009 transitions. [2023-08-30 00:33:57,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 139.13888888888889) internal successors, (5009), 36 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:57,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:57,578 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:57,578 INFO L175 Difference]: Start difference. First operand has 243 places, 155 transitions, 1409 flow. Second operand 36 states and 5009 transitions. [2023-08-30 00:33:57,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 995 transitions, 9389 flow [2023-08-30 00:35:59,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 995 transitions, 9263 flow, removed 26 selfloop flow, removed 4 redundant places. [2023-08-30 00:35:59,339 INFO L231 Difference]: Finished difference. Result has 280 places, 168 transitions, 1637 flow [2023-08-30 00:35:59,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1637, PETRI_PLACES=280, PETRI_TRANSITIONS=168} [2023-08-30 00:35:59,340 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 223 predicate places. [2023-08-30 00:35:59,340 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 168 transitions, 1637 flow [2023-08-30 00:35:59,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 129.25) internal successors, (3102), 24 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:59,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:35:59,341 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:35:59,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 00:35:59,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:59,542 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:35:59,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:35:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash 119636929, now seen corresponding path program 5 times [2023-08-30 00:35:59,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:35:59,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135397900] [2023-08-30 00:35:59,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:35:59,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:35:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:35:59,543 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:35:59,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 00:35:59,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 00:35:59,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:35:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:35:59,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:35:59,845 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:35:59,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:36:00,374 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 7 treesize of output 5 [2023-08-30 00:36:00,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 00:36:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:36:00,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:36:00,642 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 8 treesize of output 6 [2023-08-30 00:36:00,659 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 00:36:00,662 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 00:36:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:36:02,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:36:02,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135397900] [2023-08-30 00:36:02,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135397900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:36:02,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:36:02,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2023-08-30 00:36:02,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56052948] [2023-08-30 00:36:02,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:36:02,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:36:02,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:36:02,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:36:02,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:36:28,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 00:36:28,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 168 transitions, 1637 flow. Second operand has 22 states, 22 states have (on average 131.36363636363637) internal successors, (2890), 22 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:28,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:36:28,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 00:36:28,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand