./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-buffer-series2.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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:42:35,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:42:35,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:42:35,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:42:35,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:42:35,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:42:35,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:42:35,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:42:35,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:42:35,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:42:35,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:42:35,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:42:35,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:42:35,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:42:35,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:42:35,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:42:35,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:42:35,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:42:35,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:42:35,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:42:35,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:42:35,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:42:35,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:42:35,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:42:35,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:42:35,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:42:35,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:42:35,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:42:35,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:42:35,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:42:35,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:42:35,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:42:35,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:42:35,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:42:35,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:42:35,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:42:35,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:42:35,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:42:35,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:42:35,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:42:35,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:42:35,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:42:35,741 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:42:35,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:42:35,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:42:35,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:42:35,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:42:35,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:42:35,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:42:35,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:42:35,744 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:42:35,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:42:35,745 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:42:35,745 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:42:35,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:42:35,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:42:35,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:42:35,746 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:42:35,746 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:42:35,746 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:42:35,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:42:35,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:42:35,747 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:42:35,747 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:42:35,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:42:35,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:42:35,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:42:35,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:42:35,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:42:35,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:42:35,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:42:35,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:42:35,749 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:42:35,749 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:42:35,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:42:35,749 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:42:35,749 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:42:36,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:42:36,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:42:36,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:42:36,073 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:42:36,074 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:42:36,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-08-30 06:42:37,221 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:42:37,467 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:42:37,467 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-08-30 06:42:37,473 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae06c402/99e6ad7f5a4b4767bf12dd6de23a9e08/FLAG4db10d075 [2023-08-30 06:42:37,802 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae06c402/99e6ad7f5a4b4767bf12dd6de23a9e08 [2023-08-30 06:42:37,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:42:37,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:42:37,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:42:37,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:42:37,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:42:37,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:42:37" (1/1) ... [2023-08-30 06:42:37,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22656803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:37, skipping insertion in model container [2023-08-30 06:42:37,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:42:37" (1/1) ... [2023-08-30 06:42:37,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:42:37,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:42:37,993 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-buffer-series2.wvr.c[4232,4245] [2023-08-30 06:42:38,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:42:38,027 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 06:42:38,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5aac5b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:38, skipping insertion in model container [2023-08-30 06:42:38,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:42:38,030 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:42:38,031 INFO L158 Benchmark]: Toolchain (without parser) took 224.99ms. Allocated memory is still 67.1MB. Free memory was 44.5MB in the beginning and 34.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:42:38,032 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 44.2MB in the end (delta: 49.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:42:38,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.23ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 34.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:42:38,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 44.2MB in the end (delta: 49.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 223.23ms. Allocated memory is still 67.1MB. Free memory was 44.3MB in the beginning and 34.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 160]: 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-buffer-series2.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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:42:39,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:42:39,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:42:39,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:42:39,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:42:39,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:42:39,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:42:39,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:42:39,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:42:39,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:42:39,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:42:39,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:42:39,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:42:39,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:42:39,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:42:39,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:42:39,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:42:39,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:42:39,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:42:39,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:42:39,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:42:39,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:42:39,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:42:39,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:42:39,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:42:39,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:42:39,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:42:39,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:42:39,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:42:39,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:42:39,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:42:39,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:42:39,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:42:39,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:42:39,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:42:39,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:42:39,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:42:39,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:42:39,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:42:39,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:42:39,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:42:39,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:42:39,880 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:42:39,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:42:39,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:42:39,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:42:39,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:42:39,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:42:39,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:42:39,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:42:39,883 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:42:39,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:42:39,884 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:42:39,884 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:42:39,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:42:39,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:42:39,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:42:39,885 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:42:39,885 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:42:39,886 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:42:39,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:42:39,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:42:39,886 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:42:39,886 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:42:39,886 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:42:39,887 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:42:39,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:42:39,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:42:39,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:42:39,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:42:39,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:42:39,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:42:39,888 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:42:39,888 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:42:39,888 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:42:39,889 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:42:39,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:42:39,889 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:42:39,889 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:42:39,889 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:42:40,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:42:40,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:42:40,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:42:40,219 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:42:40,220 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:42:40,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-08-30 06:42:41,447 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:42:41,677 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:42:41,677 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-08-30 06:42:41,684 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c925bd51/54931965347e4fa48bf15439028e4daa/FLAG217fe3a75 [2023-08-30 06:42:41,696 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c925bd51/54931965347e4fa48bf15439028e4daa [2023-08-30 06:42:41,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:42:41,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:42:41,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:42:41,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:42:41,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:42:41,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:42:41" (1/1) ... [2023-08-30 06:42:41,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3862c02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:41, skipping insertion in model container [2023-08-30 06:42:41,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:42:41" (1/1) ... [2023-08-30 06:42:41,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:42:41,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:42:41,923 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-buffer-series2.wvr.c[4232,4245] [2023-08-30 06:42:41,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:42:41,958 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:42:41,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:42:41,999 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-buffer-series2.wvr.c[4232,4245] [2023-08-30 06:42:42,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:42:42,019 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:42:42,059 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-buffer-series2.wvr.c[4232,4245] [2023-08-30 06:42:42,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:42:42,080 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:42:42,082 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:42:42,088 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:42:42,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42 WrapperNode [2023-08-30 06:42:42,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:42:42,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:42:42,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:42:42,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:42:42,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,167 INFO L138 Inliner]: procedures = 29, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 344 [2023-08-30 06:42:42,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:42:42,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:42:42,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:42:42,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:42:42,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,212 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:42:42,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:42:42,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:42:42,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:42:42,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (1/1) ... [2023-08-30 06:42:42,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:42:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:42:42,260 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 06:42:42,277 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 06:42:42,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:42:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:42:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:42:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:42:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:42:42,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:42:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:42:42,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:42:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:42:42,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:42:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:42:42,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:42:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:42:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:42:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:42:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:42:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:42:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:42:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:42:42,306 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 06:42:42,404 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:42:42,406 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:42:43,135 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:42:43,391 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:42:43,391 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-30 06:42:43,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:42:43 BoogieIcfgContainer [2023-08-30 06:42:43,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:42:43,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:42:43,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:42:43,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:42:43,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:42:41" (1/3) ... [2023-08-30 06:42:43,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f95e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:42:43, skipping insertion in model container [2023-08-30 06:42:43,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:42" (2/3) ... [2023-08-30 06:42:43,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f95e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:42:43, skipping insertion in model container [2023-08-30 06:42:43,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:42:43" (3/3) ... [2023-08-30 06:42:43,402 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2023-08-30 06:42:43,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:42:43,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 06:42:43,417 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:42:43,527 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 06:42:43,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 274 places, 283 transitions, 598 flow [2023-08-30 06:42:43,702 INFO L130 PetriNetUnfolder]: 22/279 cut-off events. [2023-08-30 06:42:43,702 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:42:43,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 279 events. 22/279 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 279 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 229. Up to 2 conditions per place. [2023-08-30 06:42:43,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 274 places, 283 transitions, 598 flow [2023-08-30 06:42:43,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 275 transitions, 574 flow [2023-08-30 06:42:43,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:42:43,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 275 transitions, 574 flow [2023-08-30 06:42:43,736 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 275 transitions, 574 flow [2023-08-30 06:42:43,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 275 transitions, 574 flow [2023-08-30 06:42:43,790 INFO L130 PetriNetUnfolder]: 22/275 cut-off events. [2023-08-30 06:42:43,791 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:42:43,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 275 events. 22/275 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 283 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 229. Up to 2 conditions per place. [2023-08-30 06:42:43,796 INFO L119 LiptonReduction]: Number of co-enabled transitions 3860 [2023-08-30 06:43:09,971 WARN L222 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 141 DAG size of output: 140 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 06:43:16,912 WARN L222 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 144 DAG size of output: 143 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 06:43:17,286 INFO L134 LiptonReduction]: Checked pairs total: 6763 [2023-08-30 06:43:17,287 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-08-30 06:43:17,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:43:17,301 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;@22508b95, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:43:17,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-08-30 06:43:17,303 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:43:17,303 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:43:17,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:17,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:43:17,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:43:17,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash 43525, now seen corresponding path program 1 times [2023-08-30 06:43:17,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:17,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343914308] [2023-08-30 06:43:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:17,320 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 06:43:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:17,325 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 06:43:17,329 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 06:43:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:43:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:17,664 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:43:17,665 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:43:17,694 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 06:43:17,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:17,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:17,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343914308] [2023-08-30 06:43:17,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343914308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:17,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:17,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:43:17,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542407823] [2023-08-30 06:43:17,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:17,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:43:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:17,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:43:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:43:17,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 570 [2023-08-30 06:43:17,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:17,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 570 [2023-08-30 06:43:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:22,873 INFO L130 PetriNetUnfolder]: 31011/38240 cut-off events. [2023-08-30 06:43:22,874 INFO L131 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2023-08-30 06:43:22,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76701 conditions, 38240 events. 31011/38240 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 2909. Compared 195022 event pairs, 19709 based on Foata normal form. 0/8099 useless extension candidates. Maximal degree in co-relation 69825. Up to 37645 conditions per place. [2023-08-30 06:43:23,338 INFO L137 encePairwiseOnDemand]: 563/570 looper letters, 61 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-30 06:43:23,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 284 flow [2023-08-30 06:43:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-08-30 06:43:23,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43450292397660817 [2023-08-30 06:43:23,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-08-30 06:43:23,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-08-30 06:43:23,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:23,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-08-30 06:43:23,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:23,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:23,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:23,384 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 172 flow. Second operand 3 states and 743 transitions. [2023-08-30 06:43:23,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 284 flow [2023-08-30 06:43:23,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 06:43:23,439 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 146 flow [2023-08-30 06:43:23,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-08-30 06:43:23,445 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -12 predicate places. [2023-08-30 06:43:23,445 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 146 flow [2023-08-30 06:43:23,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:23,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:23,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:43:23,461 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 06:43:23,655 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 06:43:23,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:43:23,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash 43524, now seen corresponding path program 1 times [2023-08-30 06:43:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393675421] [2023-08-30 06:43:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:23,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:23,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:23,663 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 06:43:23,666 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 06:43:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:43:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:23,885 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:43:23,886 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:43:23,923 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 06:43:23,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:23,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:23,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393675421] [2023-08-30 06:43:23,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393675421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:23,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:23,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:43:23,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627364824] [2023-08-30 06:43:23,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:23,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:43:23,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:43:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:43:24,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 570 [2023-08-30 06:43:24,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:24,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:24,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 570 [2023-08-30 06:43:24,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:31,818 INFO L130 PetriNetUnfolder]: 62007/76462 cut-off events. [2023-08-30 06:43:31,818 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:43:31,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152341 conditions, 76462 events. 62007/76462 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5212. Compared 416257 event pairs, 39415 based on Foata normal form. 0/17080 useless extension candidates. Maximal degree in co-relation 152335. Up to 37641 conditions per place. [2023-08-30 06:43:32,278 INFO L137 encePairwiseOnDemand]: 561/570 looper letters, 114 selfloop transitions, 6 changer transitions 0/126 dead transitions. [2023-08-30 06:43:32,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 126 transitions, 510 flow [2023-08-30 06:43:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2023-08-30 06:43:32,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 06:43:32,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2023-08-30 06:43:32,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2023-08-30 06:43:32,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:32,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2023-08-30 06:43:32,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:32,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:32,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:32,289 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 146 flow. Second operand 3 states and 798 transitions. [2023-08-30 06:43:32,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 126 transitions, 510 flow [2023-08-30 06:43:32,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:32,292 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 195 flow [2023-08-30 06:43:32,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-08-30 06:43:32,293 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -9 predicate places. [2023-08-30 06:43:32,293 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 195 flow [2023-08-30 06:43:32,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:32,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:32,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:43:32,305 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 (3)] Ended with exit code 0 [2023-08-30 06:43:32,502 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 06:43:32,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:43:32,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:32,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1353150, now seen corresponding path program 1 times [2023-08-30 06:43:32,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:32,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646823575] [2023-08-30 06:43:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:32,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:32,509 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 06:43:32,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:43:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:32,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:43:32,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:32,753 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:43:32,754 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:43:32,819 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 06:43:32,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:32,965 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 06:43:32,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:32,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646823575] [2023-08-30 06:43:32,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646823575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:32,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:32,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:43:32,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522687309] [2023-08-30 06:43:32,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:32,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:43:32,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:32,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:43:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:43:33,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 570 [2023-08-30 06:43:33,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:33,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:33,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 570 [2023-08-30 06:43:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:45,701 INFO L130 PetriNetUnfolder]: 93013/114700 cut-off events. [2023-08-30 06:43:45,701 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:43:45,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228565 conditions, 114700 events. 93013/114700 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7572. Compared 649763 event pairs, 59121 based on Foata normal form. 0/26082 useless extension candidates. Maximal degree in co-relation 228556. Up to 37647 conditions per place. [2023-08-30 06:43:46,302 INFO L137 encePairwiseOnDemand]: 558/570 looper letters, 167 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2023-08-30 06:43:46,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 200 transitions, 895 flow [2023-08-30 06:43:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:43:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:43:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1463 transitions. [2023-08-30 06:43:46,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2023-08-30 06:43:46,311 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1463 transitions. [2023-08-30 06:43:46,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1463 transitions. [2023-08-30 06:43:46,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:46,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1463 transitions. [2023-08-30 06:43:46,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.83333333333334) internal successors, (1463), 6 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,329 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,329 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 195 flow. Second operand 6 states and 1463 transitions. [2023-08-30 06:43:46,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 200 transitions, 895 flow [2023-08-30 06:43:46,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 200 transitions, 871 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:43:46,335 INFO L231 Difference]: Finished difference. Result has 78 places, 94 transitions, 387 flow [2023-08-30 06:43:46,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=78, PETRI_TRANSITIONS=94} [2023-08-30 06:43:46,336 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -2 predicate places. [2023-08-30 06:43:46,337 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 94 transitions, 387 flow [2023-08-30 06:43:46,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:46,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:43:46,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-08-30 06:43:46,541 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 06:43:46,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:43:46,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash 41980588, now seen corresponding path program 1 times [2023-08-30 06:43:46,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:46,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392101383] [2023-08-30 06:43:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:46,542 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 06:43:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:46,544 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 06:43:46,545 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 06:43:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:46,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:43:46,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:46,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:46,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:46,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:46,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:46,848 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 06:43:46,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 06:43:46,908 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-30 06:43:46,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 145 [2023-08-30 06:43:47,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:47,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:43:47,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:47,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:43:47,133 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 06:43:47,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:47,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:47,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392101383] [2023-08-30 06:43:47,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392101383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:47,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:47,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:43:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953393852] [2023-08-30 06:43:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:47,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:43:47,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:43:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:43:47,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 570 [2023-08-30 06:43:47,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:47,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 570 [2023-08-30 06:43:47,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:55,891 INFO L130 PetriNetUnfolder]: 74559/92568 cut-off events. [2023-08-30 06:43:55,892 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 06:43:56,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184365 conditions, 92568 events. 74559/92568 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5988. Compared 523867 event pairs, 46947 based on Foata normal form. 0/21482 useless extension candidates. Maximal degree in co-relation 184352. Up to 90783 conditions per place. [2023-08-30 06:43:56,475 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 83 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-08-30 06:43:56,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 535 flow [2023-08-30 06:43:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-30 06:43:56,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450292397660819 [2023-08-30 06:43:56,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-30 06:43:56,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-30 06:43:56,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:56,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-30 06:43:56,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:56,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:56,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:56,485 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 387 flow. Second operand 3 states and 761 transitions. [2023-08-30 06:43:56,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 535 flow [2023-08-30 06:43:56,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 505 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:56,492 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 339 flow [2023-08-30 06:43:56,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2023-08-30 06:43:56,508 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -3 predicate places. [2023-08-30 06:43:56,508 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 339 flow [2023-08-30 06:43:56,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:56,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:56,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:43:56,519 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 (5)] Ended with exit code 0 [2023-08-30 06:43:56,719 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 06:43:56,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:43:56,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:56,719 INFO L85 PathProgramCache]: Analyzing trace with hash 41980586, now seen corresponding path program 1 times [2023-08-30 06:43:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:56,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804366182] [2023-08-30 06:43:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:56,720 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 06:43:56,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:56,721 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 06:43:56,724 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 06:43:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:43:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:56,938 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 06:43:56,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-30 06:43:57,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:57,656 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-30 06:43:57,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 06:43:58,541 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-30 06:43:58,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 182 [2023-08-30 06:45:14,372 WARN L222 SmtUtils]: Spent 50.16s on a formula simplification. DAG size of input: 326 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:45:14,374 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 06:45:14,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:45:14,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:14,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804366182] [2023-08-30 06:45:14,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804366182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:45:14,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:45:14,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:45:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663293929] [2023-08-30 06:45:14,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:14,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:45:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:45:14,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-30 06:45:21,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:45:23,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:45:25,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 570 [2023-08-30 06:45:25,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:25,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:25,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 570 [2023-08-30 06:45:25,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:31,316 INFO L130 PetriNetUnfolder]: 56077/70408 cut-off events. [2023-08-30 06:45:31,316 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:45:31,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140019 conditions, 70408 events. 56077/70408 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4240. Compared 399859 event pairs, 34767 based on Foata normal form. 0/18647 useless extension candidates. Maximal degree in co-relation 140005. Up to 68623 conditions per place. [2023-08-30 06:45:31,751 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 79 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-30 06:45:31,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 479 flow [2023-08-30 06:45:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:45:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:45:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-30 06:45:31,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2023-08-30 06:45:31,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-30 06:45:31,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-30 06:45:31,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:31,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-30 06:45:31,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:31,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:31,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:31,760 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 339 flow. Second operand 3 states and 648 transitions. [2023-08-30 06:45:31,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 479 flow [2023-08-30 06:45:31,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 478 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:31,763 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 320 flow [2023-08-30 06:45:31,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2023-08-30 06:45:31,764 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2023-08-30 06:45:31,764 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 320 flow [2023-08-30 06:45:31,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:31,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:31,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:45:31,773 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 06:45:31,969 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 06:45:31,969 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:45:31,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:31,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1688671869, now seen corresponding path program 1 times [2023-08-30 06:45:31,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:31,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227925470] [2023-08-30 06:45:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:31,970 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 06:45:31,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:31,971 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 06:45:31,973 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 06:45:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:45:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:32,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:32,373 INFO L321 Elim1Store]: treesize reduction 150, result has 25.7 percent of original size [2023-08-30 06:45:32,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 172 treesize of output 206 [2023-08-30 06:45:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:32,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:32,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:32,481 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-08-30 06:45:32,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2023-08-30 06:45:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:32,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:45:32,576 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:45:32,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:45:32,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:32,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:45:32,696 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 06:45:32,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:45:32,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:32,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227925470] [2023-08-30 06:45:32,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227925470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:45:32,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:45:32,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:45:32,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960089754] [2023-08-30 06:45:32,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:32,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:45:32,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:45:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:45:33,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 570 [2023-08-30 06:45:33,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:33,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:33,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 570 [2023-08-30 06:45:33,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:39,744 INFO L130 PetriNetUnfolder]: 54304/68089 cut-off events. [2023-08-30 06:45:39,744 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:45:39,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135382 conditions, 68089 events. 54304/68089 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4098. Compared 383580 event pairs, 33462 based on Foata normal form. 0/18284 useless extension candidates. Maximal degree in co-relation 135367. Up to 66304 conditions per place. [2023-08-30 06:45:40,113 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 06:45:40,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 84 transitions, 472 flow [2023-08-30 06:45:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:45:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:45:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2023-08-30 06:45:40,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43216374269005847 [2023-08-30 06:45:40,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2023-08-30 06:45:40,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2023-08-30 06:45:40,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:40,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2023-08-30 06:45:40,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:40,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:40,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:40,122 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 320 flow. Second operand 3 states and 739 transitions. [2023-08-30 06:45:40,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 84 transitions, 472 flow [2023-08-30 06:45:40,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:40,124 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 317 flow [2023-08-30 06:45:40,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2023-08-30 06:45:40,125 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2023-08-30 06:45:40,125 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 317 flow [2023-08-30 06:45:40,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:40,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:40,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:45:40,136 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 06:45:40,335 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 06:45:40,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:45:40,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1688671867, now seen corresponding path program 1 times [2023-08-30 06:45:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:40,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556199630] [2023-08-30 06:45:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:40,336 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 06:45:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:40,337 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 06:45:40,338 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 06:45:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:45:40,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:40,522 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 06:45:40,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 06:45:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:40,709 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-30 06:45:40,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 06:45:41,011 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 06:45:41,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:45:41,127 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 06:45:41,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:45:41,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:41,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556199630] [2023-08-30 06:45:41,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556199630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:45:41,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:45:41,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:45:41,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755510969] [2023-08-30 06:45:41,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:41,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:45:41,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:45:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:45:41,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 570 [2023-08-30 06:45:41,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:41,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:41,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 570 [2023-08-30 06:45:41,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:47,555 INFO L130 PetriNetUnfolder]: 52531/65770 cut-off events. [2023-08-30 06:45:47,555 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:45:47,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130745 conditions, 65770 events. 52531/65770 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3956. Compared 367809 event pairs, 32157 based on Foata normal form. 0/17921 useless extension candidates. Maximal degree in co-relation 130729. Up to 63985 conditions per place. [2023-08-30 06:45:47,913 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 75 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 06:45:47,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 465 flow [2023-08-30 06:45:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:45:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:45:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-30 06:45:47,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439766081871345 [2023-08-30 06:45:47,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-30 06:45:47,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-30 06:45:47,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:47,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-30 06:45:47,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:47,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:47,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:47,921 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 317 flow. Second operand 3 states and 752 transitions. [2023-08-30 06:45:47,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 465 flow [2023-08-30 06:45:47,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:47,924 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 314 flow [2023-08-30 06:45:47,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2023-08-30 06:45:47,924 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -6 predicate places. [2023-08-30 06:45:47,925 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 314 flow [2023-08-30 06:45:47,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:47,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:47,925 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:45:47,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 06:45:48,137 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 06:45:48,138 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:45:48,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1660864644, now seen corresponding path program 2 times [2023-08-30 06:45:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:48,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057148714] [2023-08-30 06:45:48,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:45:48,139 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 06:45:48,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:48,140 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 06:45:48,141 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 06:45:48,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:45:48,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:45:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:48,371 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:45:48,371 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:45:48,487 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 06:45:48,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:48,966 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 06:45:48,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:48,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057148714] [2023-08-30 06:45:48,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057148714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:48,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:48,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:45:48,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802428145] [2023-08-30 06:45:48,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:48,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:45:48,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:48,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:45:48,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:45:53,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 570 [2023-08-30 06:45:53,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 314 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:53,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:53,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 570 [2023-08-30 06:45:53,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:55,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:57,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:59,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:01,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:03,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:05,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:06,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:10,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:13,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:38,617 INFO L130 PetriNetUnfolder]: 174958/219065 cut-off events. [2023-08-30 06:46:38,618 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-30 06:46:39,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435352 conditions, 219065 events. 174958/219065 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 9053. Compared 1335607 event pairs, 107163 based on Foata normal form. 17/63223 useless extension candidates. Maximal degree in co-relation 435335. Up to 21341 conditions per place. [2023-08-30 06:46:40,005 INFO L137 encePairwiseOnDemand]: 560/570 looper letters, 459 selfloop transitions, 52 changer transitions 0/517 dead transitions. [2023-08-30 06:46:40,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 517 transitions, 2438 flow [2023-08-30 06:46:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:46:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:46:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3723 transitions. [2023-08-30 06:46:40,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43543859649122807 [2023-08-30 06:46:40,016 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3723 transitions. [2023-08-30 06:46:40,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3723 transitions. [2023-08-30 06:46:40,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:40,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3723 transitions. [2023-08-30 06:46:40,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 248.2) internal successors, (3723), 15 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:40,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 570.0) internal successors, (9120), 16 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:40,036 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 570.0) internal successors, (9120), 16 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:40,036 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 314 flow. Second operand 15 states and 3723 transitions. [2023-08-30 06:46:40,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 517 transitions, 2438 flow [2023-08-30 06:46:40,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 517 transitions, 2437 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:46:40,045 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 698 flow [2023-08-30 06:46:40,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=698, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2023-08-30 06:46:40,045 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 16 predicate places. [2023-08-30 06:46:40,046 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 698 flow [2023-08-30 06:46:40,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:40,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:40,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:46:40,060 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 06:46:40,256 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 06:46:40,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:46:40,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash 809212574, now seen corresponding path program 1 times [2023-08-30 06:46:40,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:40,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606400403] [2023-08-30 06:46:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:46:40,257 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 06:46:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:40,258 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 06:46:40,264 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 06:46:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:46:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:46:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:40,392 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 06:46:40,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:46:40,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606400403] [2023-08-30 06:46:40,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606400403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:46:40,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:46:40,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:46:40,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605902742] [2023-08-30 06:46:40,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:46:40,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:46:40,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:46:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:46:40,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 570 [2023-08-30 06:46:40,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 698 flow. Second operand has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:40,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:40,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 570 [2023-08-30 06:46:40,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand