./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-trans.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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:44:40,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:44:40,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:44:40,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:44:40,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:44:40,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:44:40,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:44:40,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:44:40,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:44:40,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:44:40,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:44:40,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:44:40,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:44:40,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:44:40,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:44:40,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:44:40,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:44:40,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:44:40,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:44:40,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:44:40,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:44:40,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:44:40,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:44:40,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:44:40,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:44:40,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:44:40,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:44:40,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:44:40,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:44:40,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:44:40,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:44:40,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:44:40,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:44:40,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:44:40,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:44:40,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:44:40,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:44:40,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:44:40,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:44:40,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:44:40,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:44:40,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:44:40,903 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:44:40,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:44:40,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:44:40,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:44:40,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:44:40,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:44:40,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:44:40,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:44:40,906 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:44:40,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:44:40,907 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:44:40,907 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:44:40,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:44:40,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:44:40,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:44:40,908 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:44:40,908 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:44:40,908 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:44:40,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:44:40,908 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:44:40,908 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:44:40,909 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:44:40,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:44:40,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:44:40,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:44:40,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:44:40,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:44:40,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:44:40,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:44:40,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:44:40,910 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:44:40,910 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:44:40,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:44:40,911 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:44:40,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:44:41,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:44:41,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:44:41,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:44:41,241 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:44:41,242 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:44:41,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-trans.wvr.c [2023-09-01 01:44:42,393 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:44:42,610 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:44:42,610 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-trans.wvr.c [2023-09-01 01:44:42,616 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f3f8669/426b1af669354017a6f76db7814565c5/FLAGaf0e7f4fb [2023-09-01 01:44:42,632 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f3f8669/426b1af669354017a6f76db7814565c5 [2023-09-01 01:44:42,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:44:42,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:44:42,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:44:42,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:44:42,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:44:42,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:44:42" (1/1) ... [2023-09-01 01:44:42,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777aaebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:42, skipping insertion in model container [2023-09-01 01:44:42,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:44:42" (1/1) ... [2023-09-01 01:44:42,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:44:42,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:44:42,852 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/chl-node-trans.wvr.c[3945,3958] [2023-09-01 01:44:42,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:44:42,893 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 01:44:42,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11f48f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:42, skipping insertion in model container [2023-09-01 01:44:42,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:44:42,896 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:44:42,897 INFO L158 Benchmark]: Toolchain (without parser) took 260.73ms. Allocated memory is still 73.4MB. Free memory was 49.9MB in the beginning and 39.3MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:44:42,898 INFO L158 Benchmark]: CDTParser took 0.96ms. Allocated memory is still 54.5MB. Free memory is still 32.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:44:42,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.60ms. Allocated memory is still 73.4MB. Free memory was 49.7MB in the beginning and 39.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:44:42,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.96ms. Allocated memory is still 54.5MB. Free memory is still 32.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 257.60ms. Allocated memory is still 73.4MB. Free memory was 49.7MB in the beginning and 39.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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/chl-node-trans.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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:44:44,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:44:44,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:44:44,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:44:44,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:44:44,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:44:44,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:44:44,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:44:44,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:44:44,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:44:44,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:44:44,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:44:44,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:44:44,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:44:44,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:44:44,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:44:44,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:44:44,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:44:44,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:44:44,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:44:44,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:44:44,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:44:44,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:44:44,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:44:44,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:44:44,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:44:44,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:44:44,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:44:44,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:44:44,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:44:44,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:44:44,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:44:44,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:44:44,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:44:44,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:44:44,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:44:44,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:44:44,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:44:44,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:44:44,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:44:44,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:44:44,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:44:44,847 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:44:44,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:44:44,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:44:44,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:44:44,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:44:44,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:44:44,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:44:44,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:44:44,851 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:44:44,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:44:44,852 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:44:44,852 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:44:44,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:44:44,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:44:44,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:44:44,853 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:44:44,853 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:44:44,853 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:44:44,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:44:44,853 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:44:44,853 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:44:44,854 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:44:44,854 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:44:44,854 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:44:44,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:44:44,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:44:44,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:44:44,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:44:44,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:44:44,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:44:44,855 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:44:44,856 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:44:44,856 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:44:44,856 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:44:44,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:44:44,856 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:44:44,857 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:44:44,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:44:45,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:44:45,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:44:45,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:44:45,184 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:44:45,184 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:44:45,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-trans.wvr.c [2023-09-01 01:44:46,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:44:46,569 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:44:46,569 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-trans.wvr.c [2023-09-01 01:44:46,576 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad01d4aa9/9a3d1965ea3848c4949ed82e501afd94/FLAG00b20e878 [2023-09-01 01:44:46,588 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad01d4aa9/9a3d1965ea3848c4949ed82e501afd94 [2023-09-01 01:44:46,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:44:46,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:44:46,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:44:46,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:44:46,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:44:46,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:44:46" (1/1) ... [2023-09-01 01:44:46,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e63ccd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:46, skipping insertion in model container [2023-09-01 01:44:46,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:44:46" (1/1) ... [2023-09-01 01:44:46,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:44:46,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:44:46,840 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/chl-node-trans.wvr.c[3945,3958] [2023-09-01 01:44:46,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:44:46,884 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:44:46,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:44:46,923 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/chl-node-trans.wvr.c[3945,3958] [2023-09-01 01:44:46,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:44:46,944 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:44:46,981 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/chl-node-trans.wvr.c[3945,3958] [2023-09-01 01:44:46,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:44:47,005 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:44:47,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47 WrapperNode [2023-09-01 01:44:47,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:44:47,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:44:47,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:44:47,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:44:47,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,079 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 413 [2023-09-01 01:44:47,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:44:47,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:44:47,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:44:47,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:44:47,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:44:47,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:44:47,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:44:47,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:44:47,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (1/1) ... [2023-09-01 01:44:47,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:44:47,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:44:47,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 01:44:47,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 01:44:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:44:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-09-01 01:44:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:44:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:44:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:44:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:44:47,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:44:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:44:47,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:44:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:44:47,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:44:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:44:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:44:47,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:44:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-09-01 01:44:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:44:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:44:47,204 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:44:47,389 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:44:47,391 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:44:48,386 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:44:48,398 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:44:48,400 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:44:48,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:44:48 BoogieIcfgContainer [2023-09-01 01:44:48,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:44:48,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:44:48,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:44:48,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:44:48,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:44:46" (1/3) ... [2023-09-01 01:44:48,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eabdf05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:44:48, skipping insertion in model container [2023-09-01 01:44:48,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:44:47" (2/3) ... [2023-09-01 01:44:48,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eabdf05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:44:48, skipping insertion in model container [2023-09-01 01:44:48,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:44:48" (3/3) ... [2023-09-01 01:44:48,416 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2023-09-01 01:44:48,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:44:48,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-09-01 01:44:48,431 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:44:48,558 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:44:48,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 516 places, 547 transitions, 1118 flow [2023-09-01 01:44:48,847 INFO L130 PetriNetUnfolder]: 41/544 cut-off events. [2023-09-01 01:44:48,847 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:44:48,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 544 events. 41/544 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1006 event pairs, 0 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 450. Up to 2 conditions per place. [2023-09-01 01:44:48,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 516 places, 547 transitions, 1118 flow [2023-09-01 01:44:48,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 509 places, 540 transitions, 1098 flow [2023-09-01 01:44:48,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:44:48,902 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 509 places, 540 transitions, 1098 flow [2023-09-01 01:44:48,906 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 509 places, 540 transitions, 1098 flow [2023-09-01 01:44:48,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 509 places, 540 transitions, 1098 flow [2023-09-01 01:44:48,997 INFO L130 PetriNetUnfolder]: 41/540 cut-off events. [2023-09-01 01:44:48,997 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:44:49,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 540 events. 41/540 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 997 event pairs, 0 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 450. Up to 2 conditions per place. [2023-09-01 01:44:49,012 INFO L119 LiptonReduction]: Number of co-enabled transitions 27258 [2023-09-01 01:45:48,972 INFO L134 LiptonReduction]: Checked pairs total: 51998 [2023-09-01 01:45:48,973 INFO L136 LiptonReduction]: Total number of compositions: 662 [2023-09-01 01:45:48,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:45:48,989 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;@2e8199d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:45:48,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-09-01 01:45:48,992 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:45:48,992 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:45:48,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:45:48,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:45:48,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:45:48,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:45:48,997 INFO L85 PathProgramCache]: Analyzing trace with hash 68331, now seen corresponding path program 1 times [2023-09-01 01:45:49,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:45:49,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094637999] [2023-09-01 01:45:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:45:49,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:45:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:45:49,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:45:49,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 01:45:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:45:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:45:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:45:49,263 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:45:49,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:45:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:45:49,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:45:49,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:45:49,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094637999] [2023-09-01 01:45:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094637999] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:45:49,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:45:49,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:45:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590612504] [2023-09-01 01:45:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:45:49,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:45:49,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:45:49,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:45:49,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:45:49,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1209 [2023-09-01 01:45:49,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 496.6666666666667) internal successors, (1490), 3 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:49,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:45:49,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1209 [2023-09-01 01:45:49,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:45:55,005 INFO L130 PetriNetUnfolder]: 28355/39551 cut-off events. [2023-09-01 01:45:55,006 INFO L131 PetriNetUnfolder]: For 695/695 co-relation queries the response was YES. [2023-09-01 01:45:55,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79738 conditions, 39551 events. 28355/39551 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242780 event pairs, 26445 based on Foata normal form. 0/12074 useless extension candidates. Maximal degree in co-relation 76220. Up to 39423 conditions per place. [2023-09-01 01:45:55,271 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 87 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-09-01 01:45:55,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 382 flow [2023-09-01 01:45:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:45:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:45:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1585 transitions. [2023-09-01 01:45:55,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43700027570995315 [2023-09-01 01:45:55,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1585 transitions. [2023-09-01 01:45:55,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1585 transitions. [2023-09-01 01:45:55,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:45:55,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1585 transitions. [2023-09-01 01:45:55,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 528.3333333333334) internal successors, (1585), 3 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:55,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:55,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:55,324 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 224 flow. Second operand 3 states and 1585 transitions. [2023-09-01 01:45:55,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 382 flow [2023-09-01 01:45:55,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 370 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:45:55,343 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 196 flow [2023-09-01 01:45:55,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2023-09-01 01:45:55,349 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -12 predicate places. [2023-09-01 01:45:55,349 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 196 flow [2023-09-01 01:45:55,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 496.6666666666667) internal successors, (1490), 3 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:55,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:45:55,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:45:55,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-09-01 01:45:55,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:45:55,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:45:55,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:45:55,573 INFO L85 PathProgramCache]: Analyzing trace with hash 68332, now seen corresponding path program 1 times [2023-09-01 01:45:55,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:45:55,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044176247] [2023-09-01 01:45:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:45:55,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:45:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:45:55,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:45:55,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 01:45:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:45:55,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:45:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:45:55,790 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:45:55,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:45:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:45:55,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:45:55,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:45:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044176247] [2023-09-01 01:45:55,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044176247] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:45:55,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:45:55,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:45:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366438236] [2023-09-01 01:45:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:45:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:45:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:45:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:45:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:45:56,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 493 out of 1209 [2023-09-01 01:45:56,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:56,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:45:56,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 493 of 1209 [2023-09-01 01:45:56,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:00,653 INFO L130 PetriNetUnfolder]: 28358/39557 cut-off events. [2023-09-01 01:46:00,653 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 01:46:00,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79297 conditions, 39557 events. 28358/39557 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242760 event pairs, 26445 based on Foata normal form. 0/12077 useless extension candidates. Maximal degree in co-relation 79291. Up to 39425 conditions per place. [2023-09-01 01:46:00,873 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 87 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2023-09-01 01:46:00,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 396 flow [2023-09-01 01:46:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-09-01 01:46:00,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43451888613178935 [2023-09-01 01:46:00,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-09-01 01:46:00,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-09-01 01:46:00,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:00,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-09-01 01:46:00,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:00,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:00,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:00,893 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 196 flow. Second operand 3 states and 1576 transitions. [2023-09-01 01:46:00,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 396 flow [2023-09-01 01:46:00,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 100 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:00,896 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 253 flow [2023-09-01 01:46:00,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2023-09-01 01:46:00,897 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2023-09-01 01:46:00,897 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 253 flow [2023-09-01 01:46:00,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:00,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:00,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:46:00,910 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 [2023-09-01 01:46:01,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:01,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:46:01,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:01,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2127197, now seen corresponding path program 1 times [2023-09-01 01:46:01,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:46:01,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268388465] [2023-09-01 01:46:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:01,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:01,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:46:01,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:46:01,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 01:46:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:01,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:46:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:01,302 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:46:01,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:46:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:01,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:01,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:46:01,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268388465] [2023-09-01 01:46:01,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268388465] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:01,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:46:01,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:46:01,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889557448] [2023-09-01 01:46:01,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:46:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:46:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:46:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:46:03,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 478 out of 1209 [2023-09-01 01:46:03,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:03,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:03,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 478 of 1209 [2023-09-01 01:46:03,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:09,852 INFO L130 PetriNetUnfolder]: 28367/39575 cut-off events. [2023-09-01 01:46:09,852 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 01:46:09,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79381 conditions, 39575 events. 28367/39575 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2018. Compared 242729 event pairs, 26445 based on Foata normal form. 0/12096 useless extension candidates. Maximal degree in co-relation 79372. Up to 39420 conditions per place. [2023-09-01 01:46:10,029 INFO L137 encePairwiseOnDemand]: 1198/1209 looper letters, 86 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2023-09-01 01:46:10,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 118 transitions, 561 flow [2023-09-01 01:46:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:46:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:46:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2989 transitions. [2023-09-01 01:46:10,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41204852495175076 [2023-09-01 01:46:10,037 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2989 transitions. [2023-09-01 01:46:10,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2989 transitions. [2023-09-01 01:46:10,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:10,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2989 transitions. [2023-09-01 01:46:10,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 498.1666666666667) internal successors, (2989), 6 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1209.0) internal successors, (8463), 7 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,059 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1209.0) internal successors, (8463), 7 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,060 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 253 flow. Second operand 6 states and 2989 transitions. [2023-09-01 01:46:10,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 118 transitions, 561 flow [2023-09-01 01:46:10,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 118 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:46:10,068 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 420 flow [2023-09-01 01:46:10,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2023-09-01 01:46:10,070 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2023-09-01 01:46:10,070 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 420 flow [2023-09-01 01:46:10,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:10,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:46:10,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:10,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:10,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:46:10,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2046759497, now seen corresponding path program 1 times [2023-09-01 01:46:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:46:10,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626138391] [2023-09-01 01:46:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:10,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:10,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:46:10,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:46:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 01:46:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:46:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:10,369 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 01:46:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:10,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:46:10,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:46:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626138391] [2023-09-01 01:46:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626138391] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:10,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:46:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600943453] [2023-09-01 01:46:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:46:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:46:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:46:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:46:10,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1209 [2023-09-01 01:46:10,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 420 flow. Second operand has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:10,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1209 [2023-09-01 01:46:10,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:14,811 INFO L130 PetriNetUnfolder]: 28367/39572 cut-off events. [2023-09-01 01:46:14,811 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2023-09-01 01:46:14,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79422 conditions, 39572 events. 28367/39572 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242802 event pairs, 26445 based on Foata normal form. 0/12100 useless extension candidates. Maximal degree in co-relation 79410. Up to 39415 conditions per place. [2023-09-01 01:46:15,009 INFO L137 encePairwiseOnDemand]: 1205/1209 looper letters, 104 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2023-09-01 01:46:15,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 632 flow [2023-09-01 01:46:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-09-01 01:46:15,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43451888613178935 [2023-09-01 01:46:15,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-09-01 01:46:15,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-09-01 01:46:15,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:15,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-09-01 01:46:15,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:15,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:15,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:15,027 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 420 flow. Second operand 3 states and 1576 transitions. [2023-09-01 01:46:15,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 632 flow [2023-09-01 01:46:15,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 115 transitions, 595 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:15,034 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 387 flow [2023-09-01 01:46:15,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2023-09-01 01:46:15,036 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-09-01 01:46:15,036 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 387 flow [2023-09-01 01:46:15,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:15,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:15,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:46:15,050 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 [2023-09-01 01:46:15,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:15,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:46:15,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2046759495, now seen corresponding path program 1 times [2023-09-01 01:46:15,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:46:15,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409632770] [2023-09-01 01:46:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:15,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:46:15,248 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:46:15,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 01:46:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:46:15,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:15,374 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:46:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:15,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:46:15,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:46:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409632770] [2023-09-01 01:46:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409632770] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:15,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:15,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:46:15,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030148707] [2023-09-01 01:46:15,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:46:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:46:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:46:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:46:16,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1209 [2023-09-01 01:46:16,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 492.25) internal successors, (1969), 4 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:16,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:16,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1209 [2023-09-01 01:46:16,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:20,053 INFO L130 PetriNetUnfolder]: 28368/39574 cut-off events. [2023-09-01 01:46:20,053 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-09-01 01:46:20,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79413 conditions, 39574 events. 28368/39574 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242815 event pairs, 26445 based on Foata normal form. 0/12105 useless extension candidates. Maximal degree in co-relation 79401. Up to 39441 conditions per place. [2023-09-01 01:46:20,265 INFO L137 encePairwiseOnDemand]: 1204/1209 looper letters, 103 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2023-09-01 01:46:20,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 117 transitions, 616 flow [2023-09-01 01:46:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:46:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:46:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2052 transitions. [2023-09-01 01:46:20,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42431761786600497 [2023-09-01 01:46:20,275 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2052 transitions. [2023-09-01 01:46:20,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2052 transitions. [2023-09-01 01:46:20,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:20,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2052 transitions. [2023-09-01 01:46:20,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:20,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:20,285 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:20,285 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 387 flow. Second operand 4 states and 2052 transitions. [2023-09-01 01:46:20,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 117 transitions, 616 flow [2023-09-01 01:46:20,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 117 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:20,288 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 418 flow [2023-09-01 01:46:20,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=418, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2023-09-01 01:46:20,288 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -2 predicate places. [2023-09-01 01:46:20,288 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 418 flow [2023-09-01 01:46:20,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 492.25) internal successors, (1969), 4 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:20,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:20,290 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:46:20,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:20,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:20,499 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:46:20,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1044340948, now seen corresponding path program 2 times [2023-09-01 01:46:20,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:46:20,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152563323] [2023-09-01 01:46:20,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:46:20,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:20,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:46:20,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:46:20,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 01:46:20,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:46:20,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:46:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:46:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:20,678 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:46:20,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:46:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:20,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:21,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:46:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152563323] [2023-09-01 01:46:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152563323] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:21,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:46:21,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:46:21,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671038082] [2023-09-01 01:46:21,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:21,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:46:21,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:46:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:46:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:46:29,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1209 [2023-09-01 01:46:29,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 418 flow. Second operand has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:29,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:29,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1209 [2023-09-01 01:46:29,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:32,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:34,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:36,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:37,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:39,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:40,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:43,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:44,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:46,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:47,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:49,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:51,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:46:57,108 INFO L130 PetriNetUnfolder]: 28388/39615 cut-off events. [2023-09-01 01:46:57,109 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-09-01 01:46:57,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79592 conditions, 39615 events. 28388/39615 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243189 event pairs, 26445 based on Foata normal form. 18/12151 useless extension candidates. Maximal degree in co-relation 79578. Up to 39421 conditions per place. [2023-09-01 01:46:57,294 INFO L137 encePairwiseOnDemand]: 1198/1209 looper letters, 87 selfloop transitions, 65 changer transitions 0/158 dead transitions. [2023-09-01 01:46:57,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 158 transitions, 984 flow [2023-09-01 01:46:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:46:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:46:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5938 transitions. [2023-09-01 01:46:57,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40929142542045766 [2023-09-01 01:46:57,308 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5938 transitions. [2023-09-01 01:46:57,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5938 transitions. [2023-09-01 01:46:57,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:57,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5938 transitions. [2023-09-01 01:46:57,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 494.8333333333333) internal successors, (5938), 12 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:57,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1209.0) internal successors, (15717), 13 states have internal predecessors, (15717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:57,341 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1209.0) internal successors, (15717), 13 states have internal predecessors, (15717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:57,341 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 418 flow. Second operand 12 states and 5938 transitions. [2023-09-01 01:46:57,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 158 transitions, 984 flow [2023-09-01 01:46:57,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 158 transitions, 963 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 01:46:57,345 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 890 flow [2023-09-01 01:46:57,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=890, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2023-09-01 01:46:57,346 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 13 predicate places. [2023-09-01 01:46:57,347 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 890 flow [2023-09-01 01:46:57,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:57,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:57,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:46:57,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:57,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:57,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:46:57,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:57,558 INFO L85 PathProgramCache]: Analyzing trace with hash -974956327, now seen corresponding path program 1 times [2023-09-01 01:46:57,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:46:57,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641954212] [2023-09-01 01:46:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:57,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:46:57,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:46:57,560 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:46:57,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 01:46:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:57,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:46:57,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:57,676 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:46:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:57,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:57,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:46:57,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641954212] [2023-09-01 01:46:57,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641954212] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:57,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:46:57,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 01:46:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849633912] [2023-09-01 01:46:57,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:57,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 01:46:57,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:46:57,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 01:46:57,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 01:47:00,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1209 [2023-09-01 01:47:00,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 890 flow. Second operand has 7 states, 7 states have (on average 477.7142857142857) internal successors, (3344), 7 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:00,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:00,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1209 [2023-09-01 01:47:00,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:07,693 INFO L130 PetriNetUnfolder]: 28402/39639 cut-off events. [2023-09-01 01:47:07,693 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-09-01 01:47:07,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79801 conditions, 39639 events. 28402/39639 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243611 event pairs, 26445 based on Foata normal form. 0/12159 useless extension candidates. Maximal degree in co-relation 79781. Up to 39423 conditions per place. [2023-09-01 01:47:07,905 INFO L137 encePairwiseOnDemand]: 1196/1209 looper letters, 134 selfloop transitions, 36 changer transitions 0/176 dead transitions. [2023-09-01 01:47:07,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1326 flow [2023-09-01 01:47:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:47:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:47:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3444 transitions. [2023-09-01 01:47:07,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40694789081885857 [2023-09-01 01:47:07,913 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3444 transitions. [2023-09-01 01:47:07,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3444 transitions. [2023-09-01 01:47:07,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:07,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3444 transitions. [2023-09-01 01:47:07,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:07,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1209.0) internal successors, (9672), 8 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:07,931 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1209.0) internal successors, (9672), 8 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:07,931 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 890 flow. Second operand 7 states and 3444 transitions. [2023-09-01 01:47:07,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1326 flow [2023-09-01 01:47:07,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1175 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-09-01 01:47:07,937 INFO L231 Difference]: Finished difference. Result has 121 places, 176 transitions, 975 flow [2023-09-01 01:47:07,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=975, PETRI_PLACES=121, PETRI_TRANSITIONS=176} [2023-09-01 01:47:07,938 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-09-01 01:47:07,938 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 176 transitions, 975 flow [2023-09-01 01:47:07,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 477.7142857142857) internal successors, (3344), 7 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:07,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:07,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:07,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 01:47:08,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:08,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:47:08,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash -158725351, now seen corresponding path program 1 times [2023-09-01 01:47:08,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:47:08,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952864926] [2023-09-01 01:47:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:08,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:47:08,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:47:08,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 01:47:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:08,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:47:08,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:47:08,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:47:08,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:47:08,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952864926] [2023-09-01 01:47:08,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952864926] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:08,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:08,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:47:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178327639] [2023-09-01 01:47:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:08,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:47:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:47:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:47:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:47:08,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 1209 [2023-09-01 01:47:08,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 176 transitions, 975 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:08,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:08,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 1209 [2023-09-01 01:47:08,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:12,790 INFO L130 PetriNetUnfolder]: 28401/39638 cut-off events. [2023-09-01 01:47:12,791 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2023-09-01 01:47:12,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79800 conditions, 39638 events. 28401/39638 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243725 event pairs, 26445 based on Foata normal form. 1/12173 useless extension candidates. Maximal degree in co-relation 79776. Up to 39510 conditions per place. [2023-09-01 01:47:13,028 INFO L137 encePairwiseOnDemand]: 1206/1209 looper letters, 167 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2023-09-01 01:47:13,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 175 transitions, 1309 flow [2023-09-01 01:47:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1584 transitions. [2023-09-01 01:47:13,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43672456575682383 [2023-09-01 01:47:13,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1584 transitions. [2023-09-01 01:47:13,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1584 transitions. [2023-09-01 01:47:13,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:13,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1584 transitions. [2023-09-01 01:47:13,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:13,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:13,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:13,040 INFO L175 Difference]: Start difference. First operand has 121 places, 176 transitions, 975 flow. Second operand 3 states and 1584 transitions. [2023-09-01 01:47:13,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 175 transitions, 1309 flow [2023-09-01 01:47:13,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1274 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 01:47:13,046 INFO L231 Difference]: Finished difference. Result has 121 places, 175 transitions, 940 flow [2023-09-01 01:47:13,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=940, PETRI_PLACES=121, PETRI_TRANSITIONS=175} [2023-09-01 01:47:13,047 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-09-01 01:47:13,047 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 175 transitions, 940 flow [2023-09-01 01:47:13,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:13,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:13,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:13,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-09-01 01:47:13,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:13,257 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:47:13,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash -732922040, now seen corresponding path program 1 times [2023-09-01 01:47:13,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:47:13,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709046226] [2023-09-01 01:47:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:13,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:47:13,260 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:47:13,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 01:47:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:13,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:47:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:47:13,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:47:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:47:13,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:47:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709046226] [2023-09-01 01:47:13,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709046226] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:47:13,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:47:13,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:47:13,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461713081] [2023-09-01 01:47:13,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:47:13,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:47:13,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:47:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:47:13,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:47:15,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1209 [2023-09-01 01:47:15,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 175 transitions, 940 flow. Second operand has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:15,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:15,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1209 [2023-09-01 01:47:15,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:24,326 INFO L130 PetriNetUnfolder]: 56787/79249 cut-off events. [2023-09-01 01:47:24,326 INFO L131 PetriNetUnfolder]: For 643/643 co-relation queries the response was YES. [2023-09-01 01:47:24,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159398 conditions, 79249 events. 56787/79249 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 3666. Compared 529288 event pairs, 52890 based on Foata normal form. 4/24321 useless extension candidates. Maximal degree in co-relation 159373. Up to 39490 conditions per place. [2023-09-01 01:47:24,880 INFO L137 encePairwiseOnDemand]: 1200/1209 looper letters, 277 selfloop transitions, 34 changer transitions 0/317 dead transitions. [2023-09-01 01:47:24,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 317 transitions, 2276 flow [2023-09-01 01:47:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:47:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:47:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4430 transitions. [2023-09-01 01:47:24,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071316974542781 [2023-09-01 01:47:24,888 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4430 transitions. [2023-09-01 01:47:24,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4430 transitions. [2023-09-01 01:47:24,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:24,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4430 transitions. [2023-09-01 01:47:24,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 492.22222222222223) internal successors, (4430), 9 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:24,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:24,910 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:24,910 INFO L175 Difference]: Start difference. First operand has 121 places, 175 transitions, 940 flow. Second operand 9 states and 4430 transitions. [2023-09-01 01:47:24,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 317 transitions, 2276 flow [2023-09-01 01:47:24,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 317 transitions, 2272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 01:47:24,920 INFO L231 Difference]: Finished difference. Result has 128 places, 188 transitions, 1133 flow [2023-09-01 01:47:24,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1133, PETRI_PLACES=128, PETRI_TRANSITIONS=188} [2023-09-01 01:47:24,921 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 25 predicate places. [2023-09-01 01:47:24,921 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 188 transitions, 1133 flow [2023-09-01 01:47:24,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:24,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:24,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:24,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:47:25,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:25,132 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:47:25,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1249966372, now seen corresponding path program 1 times [2023-09-01 01:47:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:47:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212168470] [2023-09-01 01:47:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:25,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:25,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:47:25,135 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:47:25,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 01:47:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:47:25,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:47:25,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:47:25,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:47:25,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212168470] [2023-09-01 01:47:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212168470] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:25,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:47:25,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882554828] [2023-09-01 01:47:25,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:47:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:47:25,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:47:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:47:25,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1209 [2023-09-01 01:47:25,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 188 transitions, 1133 flow. Second operand has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:25,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1209 [2023-09-01 01:47:25,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:34,724 INFO L130 PetriNetUnfolder]: 56785/79247 cut-off events. [2023-09-01 01:47:34,724 INFO L131 PetriNetUnfolder]: For 750/750 co-relation queries the response was YES. [2023-09-01 01:47:35,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159428 conditions, 79247 events. 56785/79247 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 3847. Compared 531651 event pairs, 52890 based on Foata normal form. 2/24317 useless extension candidates. Maximal degree in co-relation 159402. Up to 78980 conditions per place. [2023-09-01 01:47:35,258 INFO L137 encePairwiseOnDemand]: 1204/1209 looper letters, 168 selfloop transitions, 13 changer transitions 0/187 dead transitions. [2023-09-01 01:47:35,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 1491 flow [2023-09-01 01:47:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:47:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:47:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2076 transitions. [2023-09-01 01:47:35,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292803970223325 [2023-09-01 01:47:35,262 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2076 transitions. [2023-09-01 01:47:35,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2076 transitions. [2023-09-01 01:47:35,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:35,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2076 transitions. [2023-09-01 01:47:35,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:35,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:35,268 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:35,269 INFO L175 Difference]: Start difference. First operand has 128 places, 188 transitions, 1133 flow. Second operand 4 states and 2076 transitions. [2023-09-01 01:47:35,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 1491 flow [2023-09-01 01:47:35,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 187 transitions, 1486 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 01:47:35,276 INFO L231 Difference]: Finished difference. Result has 129 places, 187 transitions, 1150 flow [2023-09-01 01:47:35,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1150, PETRI_PLACES=129, PETRI_TRANSITIONS=187} [2023-09-01 01:47:35,277 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 26 predicate places. [2023-09-01 01:47:35,277 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 187 transitions, 1150 flow [2023-09-01 01:47:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:35,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:35,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:35,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 01:47:35,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:35,488 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:47:35,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:35,488 INFO L85 PathProgramCache]: Analyzing trace with hash -5232254, now seen corresponding path program 1 times [2023-09-01 01:47:35,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:47:35,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026103498] [2023-09-01 01:47:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:35,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:35,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:47:35,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:47:35,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 01:47:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:35,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:47:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:47:35,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:47:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:47:35,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:47:35,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026103498] [2023-09-01 01:47:35,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026103498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:47:35,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:47:35,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-09-01 01:47:35,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353274214] [2023-09-01 01:47:35,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:47:35,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:47:35,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:47:35,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:47:35,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:47:37,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1209 [2023-09-01 01:47:37,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 187 transitions, 1150 flow. Second operand has 11 states, 11 states have (on average 474.72727272727275) internal successors, (5222), 11 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:37,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:37,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1209 [2023-09-01 01:47:37,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:56,139 INFO L130 PetriNetUnfolder]: 113535/158423 cut-off events. [2023-09-01 01:47:56,139 INFO L131 PetriNetUnfolder]: For 1383/1383 co-relation queries the response was YES. [2023-09-01 01:47:56,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318534 conditions, 158423 events. 113535/158423 cut-off events. For 1383/1383 co-relation queries the response was YES. Maximal size of possible extension queue 7137. Compared 1149811 event pairs, 105780 based on Foata normal form. 4/48563 useless extension candidates. Maximal degree in co-relation 318508. Up to 78951 conditions per place. [2023-09-01 01:47:57,238 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 271 selfloop transitions, 44 changer transitions 0/321 dead transitions. [2023-09-01 01:47:57,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 321 transitions, 2557 flow [2023-09-01 01:47:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:47:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:47:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4427 transitions. [2023-09-01 01:47:57,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068559875011488 [2023-09-01 01:47:57,244 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4427 transitions. [2023-09-01 01:47:57,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4427 transitions. [2023-09-01 01:47:57,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:57,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4427 transitions. [2023-09-01 01:47:57,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 491.8888888888889) internal successors, (4427), 9 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:57,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:57,256 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:57,256 INFO L175 Difference]: Start difference. First operand has 129 places, 187 transitions, 1150 flow. Second operand 9 states and 4427 transitions. [2023-09-01 01:47:57,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 321 transitions, 2557 flow [2023-09-01 01:47:57,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 321 transitions, 2556 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:47:57,267 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 1381 flow [2023-09-01 01:47:57,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1381, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2023-09-01 01:47:57,268 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 33 predicate places. [2023-09-01 01:47:57,268 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 1381 flow [2023-09-01 01:47:57,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 474.72727272727275) internal successors, (5222), 11 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:57,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:57,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:57,279 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 (12)] Ended with exit code 0 [2023-09-01 01:47:57,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:57,479 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:47:57,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash -162261576, now seen corresponding path program 1 times [2023-09-01 01:47:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:47:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760880105] [2023-09-01 01:47:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:57,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:47:57,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:47:57,481 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:47:57,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 01:47:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:47:57,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:57,631 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:47:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:47:57,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:47:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:47:57,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:47:57,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760880105] [2023-09-01 01:47:57,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760880105] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:47:57,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:47:57,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2023-09-01 01:47:57,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978230116] [2023-09-01 01:47:57,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:47:57,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 01:47:57,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:47:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 01:47:57,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:48:02,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 1209 [2023-09-01 01:48:02,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 481.22222222222223) internal successors, (4331), 9 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:48:02,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:02,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 1209 [2023-09-01 01:48:02,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:04,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:48:07,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:48:09,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []